diff --git a/app/assets/stylesheets/specific/posts.css.scss b/app/assets/stylesheets/specific/posts.css.scss
index 1502ced20..81de0c27a 100644
--- a/app/assets/stylesheets/specific/posts.css.scss
+++ b/app/assets/stylesheets/specific/posts.css.scss
@@ -107,7 +107,7 @@ div#c-posts {
   
   div#a-index {
     div#posts {
-      margin-right: 150px;
+      width: 80%;
     }
     
     div#jlist-rss-ads-for-show {