diff --git a/VEZA_COMPLETE_MVP_TODOLIST.json b/VEZA_COMPLETE_MVP_TODOLIST.json
index 1e511f8ae..badd0edc2 100644
--- a/VEZA_COMPLETE_MVP_TODOLIST.json
+++ b/VEZA_COMPLETE_MVP_TODOLIST.json
@@ -2850,7 +2850,7 @@
       "description": "GET /api/v1/marketplace/orders/:id to get order details",
       "owner": "backend",
       "estimated_hours": 2,
-      "status": "todo",
+      "status": "completed",
       "files_involved": [],
       "implementation_steps": [
         {
@@ -2871,7 +2871,9 @@
         "Unit tests",
         "Integration tests"
       ],
-      "notes": ""
+      "notes": "",
+      "completed_at": "2025-12-24T15:00:31.104125",
+      "implementation_notes": "Implemented GET /api/v1/marketplace/orders/:id endpoint. Added GetOrder method to marketplace service that retrieves a specific order by ID, validates ownership (buyer_id must match), and preloads order items. Added GetOrder handler. Route registered in protected group."
     },
     {
       "id": "BE-API-040",
diff --git a/veza-backend-api/internal/api/router.go b/veza-backend-api/internal/api/router.go
index 579d70962..2a9092330 100644
--- a/veza-backend-api/internal/api/router.go
+++ b/veza-backend-api/internal/api/router.go
@@ -249,9 +249,11 @@ func (r *APIRouter) setupMarketplaceRoutes(router *gin.RouterGroup) {
 			return product.SellerID, nil
 		}
 		protected.PUT("/products/:id", r.config.AuthMiddleware.RequireOwnershipOrAdmin("product", productOwnerResolver), marketHandler.UpdateProduct)
-		
+
 		// BE-API-038: List orders endpoint
 		protected.GET("/orders", marketHandler.ListOrders)
+		// BE-API-039: Get order details endpoint
+		protected.GET("/orders/:id", marketHandler.GetOrder)
 		protected.POST("/orders", marketHandler.CreateOrder)
 		protected.GET("/download/:product_id", marketHandler.GetDownloadURL)
 	}
diff --git a/veza-backend-api/internal/core/marketplace/service.go b/veza-backend-api/internal/core/marketplace/service.go
index 6cfc391f1..4aa331989 100644
--- a/veza-backend-api/internal/core/marketplace/service.go
+++ b/veza-backend-api/internal/core/marketplace/service.go
@@ -14,6 +14,7 @@ import (
 
 var (
 	ErrProductNotFound   = errors.New("product not found")
+	ErrOrderNotFound     = errors.New("order not found")
 	ErrInsufficientFunds = errors.New("insufficient funds")
 	ErrOrderFailed       = errors.New("order failed processing")
 	ErrInvalidSeller     = errors.New("seller does not own the track")
@@ -42,6 +43,7 @@ type MarketplaceService interface {
 
 	// Purchasing
 	CreateOrder(ctx context.Context, buyerID uuid.UUID, items []NewOrderItem) (*Order, error)
+	GetOrder(ctx context.Context, orderID uuid.UUID, buyerID uuid.UUID) (*Order, error)
 	ListOrders(ctx context.Context, buyerID uuid.UUID) ([]Order, error)
 	ProcessPaymentWebhook(ctx context.Context, payload []byte) error
 
@@ -260,6 +262,24 @@ func (s *Service) CreateOrder(ctx context.Context, buyerID uuid.UUID, items []Ne
 	return order, nil
 }
 
+// GetOrder retrieves a specific order by ID
+// BE-API-039: Implement marketplace order details endpoint
+// Validates that the user owns the order
+func (s *Service) GetOrder(ctx context.Context, orderID uuid.UUID, buyerID uuid.UUID) (*Order, error) {
+	var order Order
+	if err := s.db.WithContext(ctx).
+		Where("id = ? AND buyer_id = ?", orderID, buyerID).
+		Preload("Items").
+		First(&order).Error; err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, ErrOrderNotFound
+		}
+		s.logger.Error("Failed to get order", zap.Error(err))
+		return nil, err
+	}
+	return &order, nil
+}
+
 // ListOrders retrieves all orders for a buyer
 // BE-API-038: Implement marketplace order list endpoint
 func (s *Service) ListOrders(ctx context.Context, buyerID uuid.UUID) ([]Order, error) {
diff --git a/veza-backend-api/internal/handlers/marketplace.go b/veza-backend-api/internal/handlers/marketplace.go
index f0fe50111..99858eb63 100644
--- a/veza-backend-api/internal/handlers/marketplace.go
+++ b/veza-backend-api/internal/handlers/marketplace.go
@@ -336,3 +336,44 @@ func (h *MarketplaceHandler) ListOrders(c *gin.Context) {
 
 	response.Success(c, orders)
 }
+
+// GetOrder gère la récupération des détails d'une commande
+// BE-API-039: GET /api/v1/marketplace/orders/:id to get order details
+// @Summary Get order details
+// @Description Get details of a specific order (only order owner can access)
+// @Tags Marketplace
+// @Accept json
+// @Produce json
+// @Security BearerAuth
+// @Param id path string true "Order ID"
+// @Success 200 {object} marketplace.Order
+// @Failure 400 {object} response.APIResponse "Validation Error"
+// @Failure 401 {object} response.APIResponse "Unauthorized"
+// @Failure 403 {object} response.APIResponse "Forbidden - Not order owner"
+// @Failure 404 {object} response.APIResponse "Order not found"
+// @Router /api/v1/marketplace/orders/{id} [get]
+func (h *MarketplaceHandler) GetOrder(c *gin.Context) {
+	userID, ok := GetUserIDUUID(c)
+	if !ok {
+		return // Erreur déjà envoyée par GetUserIDUUID
+	}
+
+	orderIDStr := c.Param("id")
+	orderID, err := uuid.Parse(orderIDStr)
+	if err != nil {
+		response.BadRequest(c, "Invalid order id")
+		return
+	}
+
+	order, err := h.service.GetOrder(c.Request.Context(), orderID, userID)
+	if err != nil {
+		if err == marketplace.ErrOrderNotFound {
+			response.NotFound(c, "Order not found")
+			return
+		}
+		response.InternalServerError(c, "Failed to get order")
+		return
+	}
+
+	response.Success(c, order)
+}