--- a/eccube/data/class/pages/admin/products/LC_Page_Admin_Products_UploadCSVCategory.php
+++ b/eccube/data/class/pages/admin/products/LC_Page_Admin_Products_UploadCSVCategory.php
@@ -243,7 +243,17 @@ class LC_Page_Admin_Products_UploadCSVCategory extends LC_Page {
             $update = false;
     } else {
         $sqlval['category_id'] = $arrRet['category_id'];
+
+        $arrCatID = $objDbQuery->select("category_id", "dtb_category",　"category_id=" . $arrRet['parent_category_id']);
+
+       if(is_numeric($arrCatID[0]['category_id'])) {
+       //  親カテゴリに指定したカテゴリはテーブルに存在 -> INSERT
+
+           $update = false;
+
+       } else {
         $update = true;
+        }
     }