diff --git a/app/controllers/management/complaints_controller.rb b/app/controllers/management/complaints_controller.rb
index 0f62e0a5d180fb9c4328bcd7d04e7816811b4d57..f213b3d719a6cd47dba21d229d6bd61aad50c70d 100644
--- a/app/controllers/management/complaints_controller.rb
+++ b/app/controllers/management/complaints_controller.rb
@@ -2,7 +2,7 @@ class Management::ComplaintsController < ManagementController
   include RepositoriesProxy
   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