diff --git a/backend/src/routes/user/dto/create_user.dto.ts b/backend/src/routes/user/dto/create_user.dto.ts
index cae620d..ee2f702 100644
--- a/backend/src/routes/user/dto/create_user.dto.ts
+++ b/backend/src/routes/user/dto/create_user.dto.ts
@@ -36,10 +36,10 @@ export class CreateUserDto {
   @MaxLength(100)
   nom: string;
 
-  @ApiProperty({ enum: GenreType, required: false, default: GenreType.AUTRE })
+  @ApiProperty({ enum: GenreType, required: false })
   @IsOptional()
   @IsEnum(GenreType)
-  genre?: GenreType = GenreType.AUTRE;
+  genre?: GenreType;
 
   @ApiProperty({ enum: RoleType })
   @IsEnum(RoleType)
@@ -86,7 +86,7 @@ export class CreateUserDto {
   @ApiProperty({ default: false })
   @IsOptional()
   @IsBoolean()
-  consentement_photo?: boolean = false;
+  consentement_photo?: boolean;
 
   @ApiProperty({ required: false })
   @IsOptional()
@@ -96,7 +96,7 @@ export class CreateUserDto {
   @ApiProperty({ default: false })
   @IsOptional()
   @IsBoolean()
-  changement_mdp_obligatoire?: boolean = false;
+  changement_mdp_obligatoire?: boolean;
 
   @ApiProperty({ example: true })
   @IsBoolean()
diff --git a/backend/src/routes/user/dto/update_gestionnaire.dto.ts b/backend/src/routes/user/dto/update_gestionnaire.dto.ts
index f9a2360..4aef50e 100644
--- a/backend/src/routes/user/dto/update_gestionnaire.dto.ts
+++ b/backend/src/routes/user/dto/update_gestionnaire.dto.ts
@@ -1,4 +1,10 @@
-import { PartialType } from "@nestjs/swagger";
+import { PartialType, ApiProperty } from "@nestjs/swagger";
 import { CreateUserDto } from "./create_user.dto";
+import { IsOptional, IsUUID } from "class-validator";
 
-export class UpdateGestionnaireDto extends PartialType(CreateUserDto) {}
\ No newline at end of file
+export class UpdateGestionnaireDto extends PartialType(CreateUserDto) {
+  @ApiProperty({ required: false, description: 'ID du relais de rattachement' })
+  @IsOptional()
+  @IsUUID()
+  relaisId?: string;
+}
diff --git a/backend/src/routes/user/user.controller.ts b/backend/src/routes/user/user.controller.ts
index af65ff1..f5fc93f 100644
--- a/backend/src/routes/user/user.controller.ts
+++ b/backend/src/routes/user/user.controller.ts
@@ -55,9 +55,9 @@ export class UserController {
     return this.userService.findOne(id);
   }
 
-  // Modifier un utilisateur (réservé super_admin)
+  // Modifier un utilisateur (réservé super_admin et admin)
   @Patch(':id')
-  @Roles(RoleType.SUPER_ADMIN)
+  @Roles(RoleType.SUPER_ADMIN, RoleType.ADMINISTRATEUR)
   @ApiOperation({ summary: 'Mettre à jour un utilisateur' })
   @ApiParam({ name: 'id', description: "UUID de l'utilisateur" })
   updateUser(
diff --git a/backend/src/routes/user/user.service.ts b/backend/src/routes/user/user.service.ts
index 08017f7..6b2581e 100644
--- a/backend/src/routes/user/user.service.ts
+++ b/backend/src/routes/user/user.service.ts
@@ -160,6 +160,11 @@ export class UserService {
             throw new ForbiddenException('Accès réservé aux super admins');
         }
 
+        // Un admin ne peut pas modifier un super admin
+        if (currentUser.role === RoleType.ADMINISTRATEUR && user.role === RoleType.SUPER_ADMIN) {
+            throw new ForbiddenException('Vous ne pouvez pas modifier un super administrateur');
+        }
+
         // Empêcher de modifier le flag changement_mdp_obligatoire pour admin/gestionnaire
         if (
             (user.role === RoleType.ADMINISTRATEUR || user.role === RoleType.GESTIONNAIRE) &&
diff --git a/frontend/lib/screens/administrateurs/creation/admin_create.dart b/frontend/lib/screens/administrateurs/creation/admin_create.dart
new file mode 100644
index 0000000..e57ac71
--- /dev/null
+++ b/frontend/lib/screens/administrateurs/creation/admin_create.dart
@@ -0,0 +1,357 @@
+import 'package:flutter/material.dart';
+import 'package:p_tits_pas/models/user.dart';
+import 'package:p_tits_pas/services/user_service.dart';
+
+class AdminCreateDialog extends StatefulWidget {
+  final AppUser? initialUser;
+
+  const AdminCreateDialog({
+    super.key,
+    this.initialUser,
+  });
+
+  @override
+  State<AdminCreateDialog> createState() => _AdminCreateDialogState();
+}
+
+class _AdminCreateDialogState extends State<AdminCreateDialog> {
+  final _formKey = GlobalKey<FormState>();
+  final _nomController = TextEditingController();
+  final _prenomController = TextEditingController();
+  final _emailController = TextEditingController();
+  final _passwordController = TextEditingController();
+  final _telephoneController = TextEditingController();
+
+  bool _isSubmitting = false;
+  bool _obscurePassword = true;
+  bool get _isEditMode => widget.initialUser != null;
+
+  @override
+  void initState() {
+    super.initState();
+    final user = widget.initialUser;
+    if (user != null) {
+      _nomController.text = user.nom ?? '';
+      _prenomController.text = user.prenom ?? '';
+      _emailController.text = user.email;
+      _telephoneController.text = user.telephone ?? '';
+      // En édition, on ne préremplit jamais le mot de passe.
+      _passwordController.clear();
+    }
+  }
+
+  @override
+  void dispose() {
+    _nomController.dispose();
+    _prenomController.dispose();
+    _emailController.dispose();
+    _passwordController.dispose();
+    _telephoneController.dispose();
+    super.dispose();
+  }
+
+  String? _required(String? value, String field) {
+    if (value == null || value.trim().isEmpty) {
+      return '$field est requis';
+    }
+    return null;
+  }
+
+  String? _validateEmail(String? value) {
+    final base = _required(value, 'Email');
+    if (base != null) return base;
+    final email = value!.trim();
+    final ok = RegExp(r'^[^@]+@[^@]+\.[^@]+$').hasMatch(email);
+    if (!ok) return 'Format email invalide';
+    return null;
+  }
+
+  String? _validatePassword(String? value) {
+    if (_isEditMode && (value == null || value.trim().isEmpty)) {
+      return null;
+    }
+    final base = _required(value, 'Mot de passe');
+    if (base != null) return base;
+    if (value!.trim().length < 6) return 'Minimum 6 caractères';
+    return null;
+  }
+
+  Future<void> _submit() async {
+    if (_isSubmitting) return;
+    if (!_formKey.currentState!.validate()) return;
+
+    setState(() {
+      _isSubmitting = true;
+    });
+
+    try {
+      if (_isEditMode) {
+        await UserService.updateAdmin(
+          adminId: widget.initialUser!.id,
+          nom: _nomController.text.trim(),
+          prenom: _prenomController.text.trim(),
+          email: _emailController.text.trim(),
+          telephone: _telephoneController.text.trim(),
+          password: _passwordController.text.trim().isEmpty
+              ? null
+              : _passwordController.text,
+        );
+      } else {
+        await UserService.createAdmin(
+          nom: _nomController.text.trim(),
+          prenom: _prenomController.text.trim(),
+          email: _emailController.text.trim(),
+          password: _passwordController.text,
+          telephone: _telephoneController.text.trim(),
+        );
+      }
+      if (!mounted) return;
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: Text(
+            _isEditMode
+                ? 'Administrateur modifié avec succès.'
+                : 'Administrateur créé avec succès.',
+          ),
+        ),
+      );
+      Navigator.of(context).pop(true);
+    } catch (e) {
+      if (!mounted) return;
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: Text(
+            e.toString().replaceFirst('Exception: ', ''),
+          ),
+          backgroundColor: Colors.red.shade700,
+        ),
+      );
+    } finally {
+      if (!mounted) return;
+      setState(() {
+        _isSubmitting = false;
+      });
+    }
+  }
+
+  Future<void> _delete() async {
+    if (!_isEditMode || _isSubmitting) return;
+
+    final confirmed = await showDialog<bool>(
+      context: context,
+      builder: (ctx) {
+        return AlertDialog(
+          title: const Text('Confirmer la suppression'),
+          content: Text(
+            'Supprimer ${widget.initialUser!.fullName.isEmpty ? widget.initialUser!.email : widget.initialUser!.fullName} ?',
+          ),
+          actions: [
+            TextButton(
+              onPressed: () => Navigator.of(ctx).pop(false),
+              child: const Text('Annuler'),
+            ),
+            FilledButton(
+              onPressed: () => Navigator.of(ctx).pop(true),
+              style: FilledButton.styleFrom(backgroundColor: Colors.red.shade700),
+              child: const Text('Supprimer'),
+            ),
+          ],
+        );
+      },
+    );
+
+    if (confirmed != true) return;
+
+    setState(() {
+      _isSubmitting = true;
+    });
+    try {
+      await UserService.deleteUser(widget.initialUser!.id);
+      if (!mounted) return;
+      ScaffoldMessenger.of(context).showSnackBar(
+        const SnackBar(content: Text('Administrateur supprimé.')),
+      );
+      Navigator.of(context).pop(true);
+    } catch (e) {
+      if (!mounted) return;
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: Text(e.toString().replaceFirst('Exception: ', '')),
+          backgroundColor: Colors.red.shade700,
+        ),
+      );
+      setState(() {
+        _isSubmitting = false;
+      });
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return AlertDialog(
+      title: Row(
+        children: [
+          Expanded(
+            child: Text(
+              _isEditMode
+                  ? 'Modifier un administrateur'
+                  : 'Créer un administrateur',
+            ),
+          ),
+          if (_isEditMode)
+            IconButton(
+              icon: const Icon(Icons.close),
+              tooltip: 'Fermer',
+              onPressed: _isSubmitting
+                  ? null
+                  : () => Navigator.of(context).pop(false),
+            ),
+        ],
+      ),
+      content: SizedBox(
+        width: 620,
+        child: Form(
+          key: _formKey,
+          child: SingleChildScrollView(
+            child: Column(
+              mainAxisSize: MainAxisSize.min,
+              children: [
+                Row(
+                  children: [
+                    Expanded(child: _buildNomField()),
+                    const SizedBox(width: 12),
+                    Expanded(child: _buildPrenomField()),
+                  ],
+                ),
+                const SizedBox(height: 12),
+                _buildEmailField(),
+                const SizedBox(height: 12),
+                Row(
+                  children: [
+                    Expanded(child: _buildPasswordField()),
+                    const SizedBox(width: 12),
+                    Expanded(child: _buildTelephoneField()),
+                  ],
+                ),
+              ],
+            ),
+          ),
+        ),
+      ),
+      actions: [
+        if (_isEditMode) ...[
+          OutlinedButton(
+            onPressed: _isSubmitting ? null : _delete,
+            style: OutlinedButton.styleFrom(foregroundColor: Colors.red.shade700),
+            child: const Text('Supprimer'),
+          ),
+          FilledButton.icon(
+            onPressed: _isSubmitting ? null : _submit,
+            icon: _isSubmitting
+                ? const SizedBox(
+                    width: 16,
+                    height: 16,
+                    child: CircularProgressIndicator(strokeWidth: 2),
+                  )
+                : const Icon(Icons.edit),
+            label: Text(_isSubmitting ? 'Modification...' : 'Modifier'),
+          ),
+        ] else ...[
+          OutlinedButton(
+            onPressed:
+                _isSubmitting ? null : () => Navigator.of(context).pop(false),
+            child: const Text('Annuler'),
+          ),
+          FilledButton.icon(
+            onPressed: _isSubmitting ? null : _submit,
+            icon: _isSubmitting
+                ? const SizedBox(
+                    width: 16,
+                    height: 16,
+                    child: CircularProgressIndicator(strokeWidth: 2),
+                  )
+                : const Icon(Icons.person_add_alt_1),
+            label: Text(_isSubmitting ? 'Création...' : 'Créer'),
+          ),
+        ],
+      ],
+    );
+  }
+
+  Widget _buildNomField() {
+    return TextFormField(
+      controller: _nomController,
+      textCapitalization: TextCapitalization.words,
+      decoration: const InputDecoration(
+        labelText: 'Nom',
+        border: OutlineInputBorder(),
+      ),
+      validator: (v) => _required(v, 'Nom'),
+    );
+  }
+
+  Widget _buildPrenomField() {
+    return TextFormField(
+      controller: _prenomController,
+      textCapitalization: TextCapitalization.words,
+      decoration: const InputDecoration(
+        labelText: 'Prénom',
+        border: OutlineInputBorder(),
+      ),
+      validator: (v) => _required(v, 'Prénom'),
+    );
+  }
+
+  Widget _buildEmailField() {
+    return TextFormField(
+      controller: _emailController,
+      keyboardType: TextInputType.emailAddress,
+      decoration: const InputDecoration(
+        labelText: 'Email',
+        border: OutlineInputBorder(),
+      ),
+      validator: _validateEmail,
+    );
+  }
+
+  Widget _buildPasswordField() {
+    return TextFormField(
+      controller: _passwordController,
+      obscureText: _obscurePassword,
+      enableSuggestions: false,
+      autocorrect: false,
+      autofillHints: _isEditMode
+          ? const <String>[]
+          : const [AutofillHints.newPassword],
+      decoration: InputDecoration(
+        labelText: _isEditMode
+            ? 'Nouveau mot de passe'
+            : 'Mot de passe',
+        border: const OutlineInputBorder(),
+        suffixIcon: IconButton(
+          onPressed: () {
+            setState(() {
+              _obscurePassword = !_obscurePassword;
+            });
+          },
+          icon: Icon(
+            _obscurePassword ? Icons.visibility_off : Icons.visibility,
+          ),
+        ),
+      ),
+      validator: _validatePassword,
+    );
+  }
+
+  Widget _buildTelephoneField() {
+    return TextFormField(
+      controller: _telephoneController,
+      keyboardType: TextInputType.phone,
+      decoration: const InputDecoration(
+        labelText: 'Téléphone',
+        border: OutlineInputBorder(),
+      ),
+      validator: (v) => _required(v, 'Téléphone'),
+    );
+  }
+}
diff --git a/frontend/lib/services/user_service.dart b/frontend/lib/services/user_service.dart
index d069bca..c80dee4 100644
--- a/frontend/lib/services/user_service.dart
+++ b/frontend/lib/services/user_service.dart
@@ -132,6 +132,82 @@ class UserService {
     return [];
   }
 
+  static Future<AppUser> createAdmin({
+    required String nom,
+    required String prenom,
+    required String email,
+    required String password,
+    required String telephone,
+  }) async {
+    final response = await http.post(
+      Uri.parse('${ApiConfig.baseUrl}${ApiConfig.users}/admin'),
+      headers: await _headers(),
+      body: jsonEncode(<String, dynamic>{
+        'nom': nom,
+        'prenom': prenom,
+        'email': email,
+        'password': password,
+        'telephone': telephone,
+      }),
+    );
+
+    if (response.statusCode != 200 && response.statusCode != 201) {
+      final decoded = jsonDecode(response.body);
+      if (decoded is Map<String, dynamic>) {
+        final message = decoded['message'];
+        if (message is List && message.isNotEmpty) {
+          throw Exception(message.join(' - '));
+        }
+        throw Exception(_toStr(message) ?? 'Erreur création administrateur');
+      }
+      throw Exception('Erreur création administrateur');
+    }
+
+    final data = jsonDecode(response.body) as Map<String, dynamic>;
+    return AppUser.fromJson(data);
+  }
+
+  static Future<AppUser> updateAdmin({
+    required String adminId,
+    required String nom,
+    required String prenom,
+    required String email,
+    required String telephone,
+    String? password,
+  }) async {
+    final body = <String, dynamic>{
+      'nom': nom,
+      'prenom': prenom,
+      'email': email,
+      'telephone': telephone,
+    };
+
+    if (password != null && password.trim().isNotEmpty) {
+      body['password'] = password.trim();
+    }
+
+    final response = await http.patch(
+      Uri.parse('${ApiConfig.baseUrl}${ApiConfig.users}/$adminId'),
+      headers: await _headers(),
+      body: jsonEncode(body),
+    );
+
+    if (response.statusCode != 200) {
+      final decoded = jsonDecode(response.body);
+      if (decoded is Map<String, dynamic>) {
+        final message = decoded['message'];
+        if (message is List && message.isNotEmpty) {
+          throw Exception(message.join(' - '));
+        }
+        throw Exception(_toStr(message) ?? 'Erreur modification administrateur');
+      }
+      throw Exception('Erreur modification administrateur');
+    }
+
+    final data = jsonDecode(response.body) as Map<String, dynamic>;
+    return AppUser.fromJson(data);
+  }
+
   static Future<void> updateGestionnaireRelais({
     required String gestionnaireId,
     required String? relaisId,
diff --git a/frontend/lib/widgets/admin/admin_management_widget.dart b/frontend/lib/widgets/admin/admin_management_widget.dart
index 666a64e..37040b3 100644
--- a/frontend/lib/widgets/admin/admin_management_widget.dart
+++ b/frontend/lib/widgets/admin/admin_management_widget.dart
@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:p_tits_pas/models/user.dart';
+import 'package:p_tits_pas/screens/administrateurs/creation/admin_create.dart';
 import 'package:p_tits_pas/services/user_service.dart';
 import 'package:p_tits_pas/widgets/admin/common/admin_user_card.dart';
 import 'package:p_tits_pas/widgets/admin/common/user_list.dart';
@@ -51,6 +52,19 @@ class _AdminManagementWidgetState extends State<AdminManagementWidget> {
     }
   }
 
+  Future<void> _openAdminEditDialog(AppUser user) async {
+    final changed = await showDialog<bool>(
+      context: context,
+      barrierDismissible: false,
+      builder: (dialogContext) {
+        return AdminCreateDialog(initialUser: user);
+      },
+    );
+    if (changed == true) {
+      await _loadAdmins();
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     final query = widget.searchQuery.toLowerCase();
@@ -80,7 +94,7 @@ class _AdminManagementWidgetState extends State<AdminManagementWidget> {
               icon: const Icon(Icons.edit),
               tooltip: 'Modifier',
               onPressed: () {
-                // TODO: Modifier admin
+                _openAdminEditDialog(user);
               },
             ),
           ],
diff --git a/frontend/lib/widgets/admin/user_management_panel.dart b/frontend/lib/widgets/admin/user_management_panel.dart
index aa408c4..5b14762 100644
--- a/frontend/lib/widgets/admin/user_management_panel.dart
+++ b/frontend/lib/widgets/admin/user_management_panel.dart
@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:p_tits_pas/screens/administrateurs/creation/admin_create.dart';
 import 'package:p_tits_pas/screens/administrateurs/creation/gestionnaires_create.dart';
 import 'package:p_tits_pas/widgets/admin/admin_management_widget.dart';
 import 'package:p_tits_pas/widgets/admin/assistante_maternelle_management_widget.dart';
@@ -17,6 +18,7 @@ class AdminUserManagementPanel extends StatefulWidget {
 class _AdminUserManagementPanelState extends State<AdminUserManagementPanel> {
   int _subIndex = 0;
   int _gestionnaireRefreshTick = 0;
+  int _adminRefreshTick = 0;
   final TextEditingController _searchController = TextEditingController();
   final TextEditingController _amCapacityController = TextEditingController();
   String? _parentStatus;
@@ -150,6 +152,7 @@ class _AdminUserManagementPanelState extends State<AdminUserManagementPanel> {
         );
       case 3:
         return AdminManagementWidget(
+          key: ValueKey('admins-$_adminRefreshTick'),
           searchQuery: _searchController.text,
         );
       default:
@@ -176,31 +179,49 @@ class _AdminUserManagementPanelState extends State<AdminUserManagementPanel> {
   }
 
   Future<void> _handleAddPressed() async {
-    if (_subIndex != 0) {
-      if (!mounted) return;
-      ScaffoldMessenger.of(context).showSnackBar(
-        const SnackBar(
-          content: Text(
-            'La création est disponible uniquement pour les gestionnaires.',
-          ),
-        ),
+    if (_subIndex == 0) {
+      final created = await showDialog<bool>(
+        context: context,
+        barrierDismissible: false,
+        builder: (dialogContext) {
+          return const GestionnaireCreateDialog();
+        },
       );
+
+      if (!mounted) return;
+      if (created == true) {
+        setState(() {
+          _gestionnaireRefreshTick++;
+        });
+      }
       return;
     }
 
-    final created = await showDialog<bool>(
-      context: context,
-      barrierDismissible: false,
-      builder: (dialogContext) {
-        return const GestionnaireCreateDialog();
-      },
-    );
+    if (_subIndex == 3) {
+      final created = await showDialog<bool>(
+        context: context,
+        barrierDismissible: false,
+        builder: (dialogContext) {
+          return const AdminCreateDialog();
+        },
+      );
+
+      if (!mounted) return;
+      if (created == true) {
+        setState(() {
+          _adminRefreshTick++;
+        });
+      }
+      return;
+    }
 
     if (!mounted) return;
-    if (created == true) {
-      setState(() {
-        _gestionnaireRefreshTick++;
-      });
-    }
+    ScaffoldMessenger.of(context).showSnackBar(
+      const SnackBar(
+        content: Text(
+          'La création est disponible uniquement pour les gestionnaires et les administrateurs.',
+        ),
+      ),
+    );
   }
 }