diff --git a/app/views/announcements/index.html.erb b/app/views/announcements/index.html.erb
index a6aed5f..a7c063c 100644
--- a/app/views/announcements/index.html.erb
+++ b/app/views/announcements/index.html.erb
@@ -51,10 +51,10 @@
       else
         cats = cats.map{|v| Category.where(id: v).first}.compact
       end
-      all_cat = [[t('announcement.all'),'all']]
+      all_cat = [[t('announcement.select_prompt'),'all'],[t('announcement.all'),'all']]
     %>
     <div class="search_widget" style="display: flex;flex-wrap: wrap;font-size: 1.1em;">
-      <%= select_tag('category',options_for_select(all_cat.concat(cats.map{|v| [v.title,v.id.to_s]}),:selected => @params['category'].to_s),:id=>"category_select_box",:prompt => t('announcement.select_prompt')) %>
+      <%= select_tag('category',options_for_select(all_cat.concat(cats.map{|v| [v.title,v.id.to_s]}),:selected => @params['category'].to_s),:id=>"category_select_box") %>
       <input class="search_box" type="text" name="keywords" value="<%= @params['keywords'].to_s.gsub(/\"/,'') %>" placeholder="<%= t('announcement.keywords') %>">
       <div style="display: flex;flex-wrap: wrap;">
         <div class="default_picker">