diff --git a/src/Eccube/Controller/Admin/Product/ProductController.php b/src/Eccube/Controller/Admin/Product/ProductController.php
index d650a67cf3c..091a456dc6c 100644
--- a/src/Eccube/Controller/Admin/Product/ProductController.php
+++ b/src/Eccube/Controller/Admin/Product/ProductController.php
@@ -631,8 +631,7 @@ public function edit(Request $request, RouterInterface $router, CacheUtil $cache
 
                 $this->entityManager->flush();
 
-                if (array_key_exists('product_image', $request->request->get('admin_product'))) {
-                    $product_image = $request->request->get('admin_product')['product_image'];
+                if ($product_image = $request->request->all()['admin_product']['product_image'] ?? []) {
                     foreach ($product_image as $sortNo => $filename) {
                         $ProductImage = $this->productImageRepository
                             ->findOneBy([