diff --git a/backend/src/index.ts b/backend/src/index.ts
index 8d235dd..4c7fe4e 100644
--- a/backend/src/index.ts
+++ b/backend/src/index.ts
@@ -7,6 +7,7 @@ import { AppDataSource } from "./config/data-source";
 import authRoutes from "./routes/auth.routes";
 import videoRoutes from "./routes/video.routes";
 import playlistRoutes from "./routes/playlist.routes";
+import adminRoutes from "./routes/admin.routes";
 
 dotenv.config();
 
@@ -27,6 +28,7 @@ app.get("/api/health", (_req, res) => {
 app.use("/api/auth", authRoutes);
 app.use("/api/videos", videoRoutes);
 app.use("/api/playlists", playlistRoutes);
+app.use("/api/admin", adminRoutes);
 
 AppDataSource.initialize()
   .then(() => {
diff --git a/backend/src/middleware/admin.middleware.ts b/backend/src/middleware/admin.middleware.ts
new file mode 100644
index 0000000..58f0236
--- /dev/null
+++ b/backend/src/middleware/admin.middleware.ts
@@ -0,0 +1,37 @@
+import { Response, NextFunction } from "express";
+import { AppDataSource } from "../config/data-source";
+import { UserRole } from "../entities/UserRole";
+import { AuthenticatedRequest } from "./auth.middleware";
+
+/**
+ * Middleware requireAdmin — s'exécute APRÈS requireAuth.
+ * Charge les rôles de l'utilisateur depuis la DB et vérifie
+ * la présence du slug "admin" ou "super_admin".
+ * Retourne 403 FORBIDDEN si la condition n'est pas remplie.
+ */
+export const requireAdmin = async (
+  req: AuthenticatedRequest,
+  res: Response,
+  next: NextFunction
+): Promise<void> => {
+  try {
+    const userId = req.user.id;
+
+    const userRoles = await AppDataSource.getRepository(UserRole).find({
+      where: { userId },
+      relations: ["role"],
+    });
+
+    const slugs = userRoles.map((ur) => ur.role.slug);
+    const isAdmin = slugs.includes("admin") || slugs.includes("super_admin");
+
+    if (!isAdmin) {
+      res.status(403).json({ success: false, error: "FORBIDDEN" });
+      return;
+    }
+
+    next();
+  } catch {
+    res.status(500).json({ success: false, error: "INTERNAL_ERROR" });
+  }
+};
diff --git a/backend/src/routes/admin.routes.ts b/backend/src/routes/admin.routes.ts
new file mode 100644
index 0000000..c20b501
--- /dev/null
+++ b/backend/src/routes/admin.routes.ts
@@ -0,0 +1,345 @@
+import { Router, Request, Response } from "express";
+import { AppDataSource } from "../config/data-source";
+import { Video } from "../entities/Video";
+import { User } from "../entities/User";
+import { UserRole } from "../entities/UserRole";
+import { Role } from "../entities/Role";
+import { UserSubscription } from "../entities/UserSubscription";
+import { SubscriptionPlan } from "../entities/SubscriptionPlan";
+import { requireAuth, AuthenticatedRequest } from "../middleware/auth.middleware";
+import { requireAdmin } from "../middleware/admin.middleware";
+
+const router = Router();
+
+// Applique requireAuth + requireAdmin sur toutes les routes de ce routeur
+router.use(requireAuth as unknown as (req: Request, res: Response, next: () => void) => void);
+router.use(requireAdmin as unknown as (req: Request, res: Response, next: () => void) => void);
+
+// ---------------------------------------------------------------------------
+// VIDEOS
+// ---------------------------------------------------------------------------
+
+/**
+ * GET /api/admin/videos
+ * Liste toutes les vidéos (publiées et non publiées), tous les champs.
+ */
+router.get("/videos", async (_req: Request, res: Response): Promise<void> => {
+  try {
+    const videos = await AppDataSource.getRepository(Video).find({
+      order: { createdAt: "DESC" },
+    });
+    res.json({ success: true, data: { videos } });
+  } catch {
+    res.status(500).json({ success: false, error: "INTERNAL_ERROR" });
+  }
+});
+
+/**
+ * POST /api/admin/videos
+ * Crée une nouvelle vidéo.
+ * Body: { title, description?, thumbnailUrl?, duration?, storageType, storageKey, requiredLevel?, isPublished? }
+ */
+router.post("/videos", async (req: Request, res: Response): Promise<void> => {
+  try {
+    const {
+      title,
+      description = null,
+      thumbnailUrl = null,
+      duration = null,
+      storageType,
+      storageKey,
+      requiredLevel = 0,
+      isPublished = false,
+    } = req.body as {
+      title: string;
+      description?: string | null;
+      thumbnailUrl?: string | null;
+      duration?: number | null;
+      storageType: string;
+      storageKey: string;
+      requiredLevel?: number;
+      isPublished?: boolean;
+    };
+
+    if (!title || !storageType || !storageKey) {
+      res.status(400).json({ success: false, error: "MISSING_REQUIRED_FIELDS" });
+      return;
+    }
+
+    const video = AppDataSource.getRepository(Video).create({
+      id: crypto.randomUUID(),
+      title,
+      description,
+      thumbnailUrl,
+      duration,
+      storageType: storageType as Video["storageType"],
+      storageKey,
+      requiredLevel,
+      isPublished,
+      publishedAt: isPublished ? new Date() : null,
+    });
+
+    await AppDataSource.getRepository(Video).save(video);
+    res.status(201).json({ success: true, data: { video } });
+  } catch {
+    res.status(500).json({ success: false, error: "INTERNAL_ERROR" });
+  }
+});
+
+/**
+ * PATCH /api/admin/videos/:id
+ * Met à jour une vidéo (champs partiels).
+ */
+router.patch("/videos/:id", async (req: Request, res: Response): Promise<void> => {
+  try {
+    const repo = AppDataSource.getRepository(Video);
+    const video = await repo.findOne({ where: { id: req.params.id } });
+
+    if (!video) {
+      res.status(404).json({ success: false, error: "NOT_FOUND" });
+      return;
+    }
+
+    const allowed = [
+      "title", "description", "thumbnailUrl", "duration",
+      "storageType", "storageKey", "requiredLevel", "isPublished",
+    ] as const;
+
+    for (const field of allowed) {
+      if (field in req.body) {
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        (video as any)[field] = (req.body as Record<string, unknown>)[field];
+      }
+    }
+
+    // Mise à jour de publishedAt si on publie maintenant
+    if (req.body.isPublished === true && !video.publishedAt) {
+      video.publishedAt = new Date();
+    } else if (req.body.isPublished === false) {
+      video.publishedAt = null;
+    }
+
+    await repo.save(video);
+    res.json({ success: true, data: { video } });
+  } catch {
+    res.status(500).json({ success: false, error: "INTERNAL_ERROR" });
+  }
+});
+
+/**
+ * DELETE /api/admin/videos/:id
+ * Supprime une vidéo.
+ */
+router.delete("/videos/:id", async (req: Request, res: Response): Promise<void> => {
+  try {
+    const repo = AppDataSource.getRepository(Video);
+    const video = await repo.findOne({ where: { id: req.params.id } });
+
+    if (!video) {
+      res.status(404).json({ success: false, error: "NOT_FOUND" });
+      return;
+    }
+
+    await repo.remove(video);
+    res.json({ success: true, data: { deleted: req.params.id } });
+  } catch {
+    res.status(500).json({ success: false, error: "INTERNAL_ERROR" });
+  }
+});
+
+// ---------------------------------------------------------------------------
+// USERS
+// ---------------------------------------------------------------------------
+
+/**
+ * GET /api/admin/users
+ * Liste tous les utilisateurs avec leurs rôles et abonnement actif.
+ */
+router.get("/users", async (_req: Request, res: Response): Promise<void> => {
+  try {
+    const users = await AppDataSource.getRepository(User).find({
+      relations: ["userRoles", "userRoles.role", "subscriptions", "subscriptions.plan"],
+      order: { createdAt: "DESC" },
+    });
+
+    const result = users.map((u) => ({
+      id: u.id,
+      email: u.email,
+      nickname: u.nickname,
+      isActive: u.isActive,
+      createdAt: u.createdAt,
+      roles: u.userRoles.map((ur) => ({ id: ur.role.id, slug: ur.role.slug, name: ur.role.name })),
+      activeSubscription: u.subscriptions.find((s) => s.status === "active")
+        ? {
+            id: u.subscriptions.find((s) => s.status === "active")!.id,
+            status: u.subscriptions.find((s) => s.status === "active")!.status,
+            startsAt: u.subscriptions.find((s) => s.status === "active")!.startsAt,
+            endsAt: u.subscriptions.find((s) => s.status === "active")!.endsAt,
+            plan: u.subscriptions.find((s) => s.status === "active")!.plan,
+          }
+        : null,
+    }));
+
+    res.json({ success: true, data: { users: result } });
+  } catch {
+    res.status(500).json({ success: false, error: "INTERNAL_ERROR" });
+  }
+});
+
+/**
+ * PATCH /api/admin/users/:id/roles
+ * Assigne des rôles à un utilisateur (remplace les rôles existants).
+ * Body: { roles: string[] } — slugs de rôles
+ */
+router.patch("/users/:id/roles", async (req: Request, res: Response): Promise<void> => {
+  try {
+    const { roles } = req.body as { roles: string[] };
+
+    if (!Array.isArray(roles)) {
+      res.status(400).json({ success: false, error: "INVALID_BODY" });
+      return;
+    }
+
+    const userRepo = AppDataSource.getRepository(User);
+    const roleRepo = AppDataSource.getRepository(Role);
+    const userRoleRepo = AppDataSource.getRepository(UserRole);
+
+    const user = await userRepo.findOne({ where: { id: req.params.id } });
+    if (!user) {
+      res.status(404).json({ success: false, error: "NOT_FOUND" });
+      return;
+    }
+
+    // Résoudre les slugs en entités Role
+    const roleEntities = await roleRepo
+      .createQueryBuilder("role")
+      .where("role.slug IN (:...slugs)", { slugs: roles.length > 0 ? roles : ["__none__"] })
+      .getMany();
+
+    if (roleEntities.length !== roles.length) {
+      res.status(400).json({ success: false, error: "INVALID_ROLE_SLUGS" });
+      return;
+    }
+
+    // Supprimer tous les rôles existants pour cet user
+    await userRoleRepo.delete({ userId: req.params.id });
+
+    // Insérer les nouveaux rôles
+    const newUserRoles = roleEntities.map((role) => {
+      const ur = new UserRole();
+      ur.userId = req.params.id;
+      ur.roleId = role.id;
+      return ur;
+    });
+
+    if (newUserRoles.length > 0) {
+      await userRoleRepo.save(newUserRoles);
+    }
+
+    res.json({
+      success: true,
+      data: {
+        userId: req.params.id,
+        roles: roleEntities.map((r) => ({ id: r.id, slug: r.slug, name: r.name })),
+      },
+    });
+  } catch {
+    res.status(500).json({ success: false, error: "INTERNAL_ERROR" });
+  }
+});
+
+// ---------------------------------------------------------------------------
+// SUBSCRIPTION PLANS
+// ---------------------------------------------------------------------------
+
+/**
+ * GET /api/admin/plans
+ * Liste tous les plans d'abonnement.
+ */
+router.get("/plans", async (_req: Request, res: Response): Promise<void> => {
+  try {
+    const plans = await AppDataSource.getRepository(SubscriptionPlan).find({
+      order: { level: "ASC" },
+    });
+    res.json({ success: true, data: { plans } });
+  } catch {
+    res.status(500).json({ success: false, error: "INTERNAL_ERROR" });
+  }
+});
+
+/**
+ * POST /api/admin/plans
+ * Crée un plan d'abonnement.
+ * Body: { slug, name, level, priceInCents, features?, isActive? }
+ */
+router.post("/plans", async (req: Request, res: Response): Promise<void> => {
+  try {
+    const {
+      slug,
+      name,
+      level,
+      priceInCents,
+      features = null,
+      isActive = true,
+    } = req.body as {
+      slug: string;
+      name: string;
+      level: number;
+      priceInCents: number;
+      features?: Record<string, unknown> | null;
+      isActive?: boolean;
+    };
+
+    if (!slug || !name || level === undefined || priceInCents === undefined) {
+      res.status(400).json({ success: false, error: "MISSING_REQUIRED_FIELDS" });
+      return;
+    }
+
+    const plan = AppDataSource.getRepository(SubscriptionPlan).create({
+      id: crypto.randomUUID(),
+      slug: slug as SubscriptionPlan["slug"],
+      name,
+      level,
+      priceInCents,
+      features,
+      isActive,
+    });
+
+    await AppDataSource.getRepository(SubscriptionPlan).save(plan);
+    res.status(201).json({ success: true, data: { plan } });
+  } catch {
+    res.status(500).json({ success: false, error: "INTERNAL_ERROR" });
+  }
+});
+
+/**
+ * PATCH /api/admin/plans/:id
+ * Met à jour un plan (isActive, priceInCents, features).
+ */
+router.patch("/plans/:id", async (req: Request, res: Response): Promise<void> => {
+  try {
+    const repo = AppDataSource.getRepository(SubscriptionPlan);
+    const plan = await repo.findOne({ where: { id: req.params.id } });
+
+    if (!plan) {
+      res.status(404).json({ success: false, error: "NOT_FOUND" });
+      return;
+    }
+
+    const allowed = ["isActive", "priceInCents", "features"] as const;
+
+    for (const field of allowed) {
+      if (field in req.body) {
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        (plan as any)[field] = (req.body as Record<string, unknown>)[field];
+      }
+    }
+
+    await repo.save(plan);
+    res.json({ success: true, data: { plan } });
+  } catch {
+    res.status(500).json({ success: false, error: "INTERNAL_ERROR" });
+  }
+});
+
+export default router;