diff --git a/AgileWorks/AgileWorks/Main/View/MainTabBarViewController.swift b/AgileWorks/AgileWorks/Main/View/MainTabBarViewController.swift
index e4df9c02d152f48b4439b464430ecd5bcaca17a7..a9a9227077474bf806c17fcccbdcac4b2ded5c5c 100644
--- a/AgileWorks/AgileWorks/Main/View/MainTabBarViewController.swift
+++ b/AgileWorks/AgileWorks/Main/View/MainTabBarViewController.swift
@@ -53,6 +53,8 @@ class MainTabBarViewController: UITabBarController {
     
     @objc
     func movedToBackground() {
+        //ウィジェット更新フラグのクリア
+        UserDefaultsDataStore().writeUpdateWidgetFlg(update: false)
         // 承認待ち件数の取得
         getApprovals { result in
             var reqApprovalCount = 0
diff --git a/AgileWorks/Common/DataStore/UserDefaultsDataStore.swift b/AgileWorks/Common/DataStore/UserDefaultsDataStore.swift
index bc9c72ba86f0cd811a274a1c5c2cd350ace75d2b..1e39b583f20c109ce0f050bb374ddd37863cf1bf 100644
--- a/AgileWorks/Common/DataStore/UserDefaultsDataStore.swift
+++ b/AgileWorks/Common/DataStore/UserDefaultsDataStore.swift
@@ -16,6 +16,7 @@ final class UserDefaultsDataStore: DataStoreProtocol {
     private let sharedDefaults: UserDefaults
     private let kFirebaseRemovalKey: String = "FirebaseRemoval"
     private let kLastAcceptedLicenseVersionKey: String = "LastAppceptedLicenseVersion"
+    private let kUpdateWidgetFlgKey : String = "UpdateWidgetFlg"
 
     init() {
         sharedDefaults = UserDefaults()
@@ -40,4 +41,17 @@ final class UserDefaultsDataStore: DataStoreProtocol {
     func readLastAcceptedLicenseVersion() -> Int? {
         return sharedDefaults.integer(forKey: kLastAcceptedLicenseVersionKey)
     }
+    
+    //ウィジェット更新フラグ
+    func writeUpdateWidgetFlg(update: Bool) {
+        sharedDefaults.set(update, forKey: kUpdateWidgetFlgKey)
+    }
+    
+    func readUpdateWidgetFlg() -> Bool? {
+        return sharedDefaults.bool(forKey: kUpdateWidgetFlgKey)
+    }
+    
+    func removeUpdateWidgetFlg(update: Bool) {
+        sharedDefaults.removeObject(forKey: kUpdateWidgetFlgKey)
+    }
 }
diff --git a/AgileWorks/WidgetExtension/WidgetExtension.swift b/AgileWorks/WidgetExtension/WidgetExtension.swift
index 0afb2a4de47eb4125f4b1cdb32a8403c760fc305..cf996405c90e19502663560304c9f5f1bfe44136 100644
--- a/AgileWorks/WidgetExtension/WidgetExtension.swift
+++ b/AgileWorks/WidgetExtension/WidgetExtension.swift
@@ -107,8 +107,13 @@ func fetch(completion: @escaping (widgetAPIResult<GetApprovalsEndpoint.Response>
     }
 
     let approvalsEndpoint = GetApprovalsEndpoint()
-
+    
+    while UserDefaultsDataStore().readUpdateWidgetFlg() ?? false {
+        //別のウィジェットが更新中の場合は待つ
+    }
+    UserDefaultsDataStore().writeUpdateWidgetFlg(update: true)
     Session.send(approvalsEndpoint) { result in
+        UserDefaultsDataStore().writeUpdateWidgetFlg(update: false)
         switch result {
         case .success(let response):
             if !response.items.isEmpty {