diff --git a/api/app/models/question.rb b/api/app/models/question.rb
index 32270e5..b7f898f 100644
--- a/api/app/models/question.rb
+++ b/api/app/models/question.rb
@@ -4,6 +4,7 @@ class Question < ApplicationRecord
   has_many :users, through: :answers
 
   before_save :set_display_order
+  after_destroy :reduce_display_order
 
   scope :ordered, -> { order(display_order: :asc) }
   scope :active, -> { where("started_at <= ? AND ? < ended_at", Time.current, Time.current) }
@@ -45,4 +46,8 @@ def set_display_order
       end
     end
 
+    def reduce_display_order
+      Question.where("display_order > ?", self.display_order).update_all("display_order = display_order - 1")
+    end
+
 end
\ No newline at end of file
diff --git a/client/src/components/users/ListUsers.tsx b/client/src/components/users/ListUsers.tsx
index b42cdf6..5417de4 100644
--- a/client/src/components/users/ListUsers.tsx
+++ b/client/src/components/users/ListUsers.tsx
@@ -34,7 +34,7 @@ export default memo(function ListUsers() {
 
     //createObjectURLで作成したオブジェクトURLを開放する
     URL.revokeObjectURL(link.href);
-  }, []);
+  }, [users]);
 
   return (
     <VStack align={"stretch"} flex={1} gap={4}>