diff --git a/app/assets/stylesheets/specific/posts.css.scss b/app/assets/stylesheets/specific/posts.css.scss
index 2ff9ee057..2d2364e48 100644
--- a/app/assets/stylesheets/specific/posts.css.scss
+++ b/app/assets/stylesheets/specific/posts.css.scss
@@ -108,6 +108,7 @@ div#c-posts {
   div#a-index {
     div#posts {
       float: left;
+      width: 90%;
     }
     
     div#jlist-rss-ads-for-show {