diff --git a/bbs/write_comment_update.php b/bbs/write_comment_update.php
index 4e93d1556..d370e625a 100644
--- a/bbs/write_comment_update.php
+++ b/bbs/write_comment_update.php
@@ -77,12 +77,15 @@ if ($w == 'c') // 댓글 입력
     // 댓글 답변
     if ($comment_id)
     {
-        $sql = " select wr_id, wr_comment, wr_comment_reply from $write_table
+        $sql = " select wr_id, wr_parent, wr_comment, wr_comment_reply from $write_table
                     where wr_id = '$comment_id' ";
         $reply_array = sql_fetch($sql);
         if (!$reply_array['wr_id'])
             alert('답변할 댓글이 없습니다.\\n\\n답변하는 동안 댓글이 삭제되었을 수 있습니다.');
 
+        if($wr['wr_parent'] != $reply_array['wr_parent'])
+            alert('댓글을 등록할 수 없습니다.');
+
         $tmp_comment = $reply_array['wr_comment'];
 
         if (strlen($reply_array['wr_comment_reply']) == 5)