diff --git a/app/views/student_work/_evaluation_un_work.html.erb b/app/views/student_work/_evaluation_un_work.html.erb
index 57dd786eb..0a3796758 100644
--- a/app/views/student_work/_evaluation_un_work.html.erb
+++ b/app/views/student_work/_evaluation_un_work.html.erb
@@ -63,7 +63,11 @@
<% if @homework.anonymous_comment == 0%>
- <%= student_work.student_score.nil? ? "未参与" : format("%.1f",student_work.student_score)%>
+ <% if student_work.student_score.nil? %>
+ 未参与
+ <% else %>
+ <%=format("%.1f",student_work.student_score) %>
+ <% end %>
<% unless student_work.student_score.nil?%>
(<%= student_work.student_works_scores.where(:reviewer_role => 3).count%>)