diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -4,19 +4,30 @@
   def user_header
     options = ''
     user = User.find(session[:user_id])
-    if user.admin? 
-      options = options + ' ' +
-	(link_to_unless_current '[Problem admin]', 
-           :controller => 'problems', :action => 'index')
-      options = options + ' ' +
-	(link_to_unless_current '[User admin]',
-           :controller => 'user_admin', :action => 'index')
-    end
+
+    # main page
     options += link_to_unless_current '[Main]',
                  :controller => 'main', :action => 'list'
+    options += ' '
+
+    # admin menu
+    if user.admin? 
+      options +=
+	(link_to_unless_current '[Problem admin]', 
+           :controller => 'problems', :action => 'index') + ' '
+      options += 
+	(link_to_unless_current '[User admin]',
+           :controller => 'user_admin', :action => 'index') + ' '
+      options += 
+	(link_to_unless_current '[User stat]',
+           :controller => 'user_admin', :action => 'user_stat') + ' '
+    end
+
+    # general options
     options += link_to_unless_current '[Settings]',
                  :controller => 'users', :action => 'index'
-    options = options + ' ' +
+    options += ' '
+    options += 
       link_to('[Log out]', {:controller => 'main', :action => 'login'})
     options
   end