diff --git a/data/class/pages/cart/LC_Page_Cart.php b/data/class/pages/cart/LC_Page_Cart.php
index 102ab107ee..ae835e4225 100644
--- a/data/class/pages/cart/LC_Page_Cart.php
+++ b/data/class/pages/cart/LC_Page_Cart.php
@@ -284,22 +284,32 @@ public function lfUpdateOrderTempid($pre_uniqid, $uniqid)
      */
     public function lfGetCartPrevUrl(&$session, $referer)
     {
-        if (!preg_match('/cart/', $referer)) {
-            if (!empty($session['cart_referer_url'])) {
-                $session['cart_prev_url'] = $session['cart_referer_url'];
-                unset($session['cart_referer_url']);
-            } else {
-                if (preg_match('/entry/', $referer)) {
-                    $session['cart_prev_url'] = HTTPS_URL . 'entry/kiyaku.php';
-                } else {
-                    $session['cart_prev_url'] = $referer;
-                }
+        // 妥当性チェック
+        if (!SC_Utils_Ex::isInternalUrl($referer)) {
+            return;
+        }
+
+        // 除外ページの場合、何もせず終了する。
+        $arrExclude = array(
+            ROOT_URLPATH . 'shopping/',
+            ROOT_URLPATH . 'cart/',
+        );
+
+        // リファラーから path を切り出す。
+        $netURL = new Net_URL($referer);
+        $referer_path = $netURL->path;
+
+        foreach ($arrExclude as $start) {
+            if (str_starts_with($referer_path, $start)) {
+                return;
             }
         }
-        // 妥当性チェック
-        if (!SC_Utils_Ex::sfIsInternalDomain($session['cart_prev_url'])) {
-            $session['cart_prev_url'] = '';
+
+        if (str_starts_with($referer_path, ROOT_URLPATH . 'entry/')) {
+            $referer = HTTPS_URL . 'entry/kiyaku.php';
         }
+
+        $session['cart_prev_url'] = $referer;
     }
 
     /**
diff --git a/data/class/pages/products/LC_Page_Products_Detail.php b/data/class/pages/products/LC_Page_Products_Detail.php
index 980cf3ed11..461203bbe1 100644
--- a/data/class/pages/products/LC_Page_Products_Detail.php
+++ b/data/class/pages/products/LC_Page_Products_Detail.php
@@ -242,11 +242,7 @@ public function action()
             case 'select':
             case 'select2':
             case 'selectItem':
-                /**
-                 * モバイルの数量指定・規格選択の際に、
-                 * $_SESSION['cart_referer_url'] を上書きさせないために、
-                 * 何もせずbreakする。
-                 */
+                // nop
                 break;
 
             default:
@@ -687,9 +683,6 @@ public function doAddFavoriteSphone(SC_Customer $objCustomer)
      */
     public function doDefault()
     {
-        // カート「戻るボタン」用に保持
-        $netURL = new Net_URL();
-        $_SESSION['cart_referer_url'] = $netURL->getURL();
     }
 
     /**
diff --git a/data/class/pages/products/LC_Page_Products_List.php b/data/class/pages/products/LC_Page_Products_List.php
index 8196299e04..455b57a780 100644
--- a/data/class/pages/products/LC_Page_Products_List.php
+++ b/data/class/pages/products/LC_Page_Products_List.php
@@ -578,11 +578,6 @@ public function doDefault(&$objProduct, &$objFormParam)
                 SC_Response_Ex::actionExit();
             }
             $js_fnOnLoad .= $this->lfSetSelectedData($this->arrProducts, $this->arrForm, $arrErr, $target_product_id);
-        } else {
-            // カート「戻るボタン」用に保持
-            $netURL = new Net_URL();
-            //該当メソッドが無いため、$_SESSIONに直接セット
-            $_SESSION['cart_referer_url'] = $netURL->getURL();
         }
 
         $this->tpl_javascript   .= 'function fnOnLoad() {' . $js_fnOnLoad . '}';