diff --git a/plugins/bc-content-link/src/Model/Table/ContentLinksTable.php b/plugins/bc-content-link/src/Model/Table/ContentLinksTable.php
index 77b0761081..c8ebbacf21 100644
--- a/plugins/bc-content-link/src/Model/Table/ContentLinksTable.php
+++ b/plugins/bc-content-link/src/Model/Table/ContentLinksTable.php
@@ -64,8 +64,10 @@ public function validationDefault(Validator $validator): Validator
         ->requirePresence('id', 'update');
 
         $validator
-        ->scalar('url')
-        ->notEmptyString('url', __d('baser_core', 'リンク先URLを入力してください。'), 'update');
+            ->scalar('url')
+            ->notEmptyString('url', __d('baser_core', 'リンク先URLを入力してください。'), 'update')
+            ->regex('url', '/^http|^\/.*/', __d('baser_core', 'リンク先URLはURLの形式を入力してください。'))
+            ->maxLength('url', 255, __d('baser_core', 'リンク先URLは255文字以内で入力してください。'));
 
         return $validator;
     }
diff --git a/plugins/bc-content-link/tests/TestCase/Model/Table/ContentLinksTableTest.php b/plugins/bc-content-link/tests/TestCase/Model/Table/ContentLinksTableTest.php
index d957639513..0c4d79a475 100644
--- a/plugins/bc-content-link/tests/TestCase/Model/Table/ContentLinksTableTest.php
+++ b/plugins/bc-content-link/tests/TestCase/Model/Table/ContentLinksTableTest.php
@@ -79,6 +79,47 @@ public function testValidationDefault()
         ], $contentLink->getErrors());
     }
 
+    /**
+     * Test testValidationURL
+     */
+    public function testValidationURL()
+    {
+        $validator = $this->ContentLinks->getValidator('default');
+        //エラー場合、
+        //スペースだけ入力
+        $errors = $validator->validate([
+            'url' => '        '
+        ]);
+        //戻り値を確認
+        $this->assertEquals('リンク先URLはURLの形式を入力してください。', current($errors['url']));
+        //スラッシュがない場合
+        $errors = $validator->validate([
+            'url' => 'あああああ'
+        ]);
+        //戻り値を確認
+        $this->assertEquals('リンク先URLはURLの形式を入力してください。', current($errors['url']));
+
+        //長いURLを入力場合
+        $errors = $validator->validate([
+            'url' => '/' . str_repeat('a', 255)
+        ]);
+        //戻り値を確認
+        $this->assertEquals('リンク先URLは255文字以内で入力してください。', current($errors['url']));
+
+        //正常場合、
+        $errors = $validator->validate([
+            'url' => '/test'
+        ]);
+        //戻り値を確認
+        $this->assertCount(0, $errors);
+
+        $errors = $validator->validate([
+            'url' => 'https://basercms.net/'
+        ]);
+        //戻り値を確認
+        $this->assertCount(0, $errors);
+    }
+
     /**
      * test beforeCopyEvent
      */
@@ -88,13 +129,13 @@ public function testBeforeCopyEvent()
         //イベントをコル
         $this->entryEventToMock(self::EVENT_LAYER_MODEL, 'BcContentLink.ContentLinks.beforeCopy', function (Event $event) {
             $data = $event->getData('data');
-            $data['url'] = 'beforeCopy';
+            $data['url'] = '/beforeCopy';
             $event->setData('data', $data);
         });
         $this->ContentLinks->copy(1, 1, 'new title', 1, 1);
         //イベントに入るかどうか確認
         $contentLinks = $this->getTableLocator()->get('BcContentLink.ContentLinks');
-        $query = $contentLinks->find()->where(['url' => 'beforeCopy']);
+        $query = $contentLinks->find()->where(['url' => '/beforeCopy']);
         $this->assertEquals(1, $query->count());
     }
 
@@ -108,13 +149,13 @@ public function testAfterCopyEvent()
         $this->entryEventToMock(self::EVENT_LAYER_MODEL, 'BcContentLink.ContentLinks.afterCopy', function (Event $event) {
             $data = $event->getData('data');
             $contentLinks = TableRegistry::getTableLocator()->get('BcContentLink.ContentLinks');
-            $data->url = 'AfterCopy';
+            $data->url = '/AfterCopy';
             $contentLinks->save($data);
         });
         $this->ContentLinks->copy(1, 1, 'new title', 1, 1);
         //イベントに入るかどうか確認
         $contentLinks = $this->getTableLocator()->get('BcContentLink.ContentLinks');
-        $query = $contentLinks->find()->where(['url' => 'AfterCopy']);
+        $query = $contentLinks->find()->where(['url' => '/AfterCopy']);
         $this->assertEquals(1, $query->count());
     }