diff --git a/app/controllers/management/complaints_controller.rb b/app/controllers/management/complaints_controller.rb
index cbfeefcd732eb8db0361ccb6debf23e79857e9c5..da3a5ba121945bd27310bbdac0c32ee39e646e4a 100644
--- a/app/controllers/management/complaints_controller.rb
+++ b/app/controllers/management/complaints_controller.rb
@@ -1,7 +1,7 @@
 class Management::ComplaintsController < ManagementController
   before_action :set_complaint, only: :destroy
   def index
-    @complaints = Complaint.all
+    @complaints = Complaint.includes(:complaint_reason, :complaintable, :user)
 
     @date = params[:period]
     @date_limit  = case @date.to_i