diff --git a/View/Helper/WysiwygHelper.php b/View/Helper/WysiwygHelper.php
index 2632787..863e4b7 100644
--- a/View/Helper/WysiwygHelper.php
+++ b/View/Helper/WysiwygHelper.php
@@ -134,8 +134,9 @@ public function wysiwygScript() {
 			);
 		}
 		// 許可するタグの設定
+		$constants['extended_valid_elements'] = 'marquee';
 		if (Current::permission('html_not_limited')) {
-			$constants['extended_valid_elements'] = 'script[src|title|type]';
+			$constants['extended_valid_elements'] = 'script[src|title|type],marquee';
 			$constants['valid_children'] = '+body[style]';
 			$constants['cleanup'] = false;
 		}