diff --git a/dictation_client/src/components/auth/constants.ts b/dictation_client/src/components/auth/constants.ts
index 34f51b0..cf2b972 100644
--- a/dictation_client/src/components/auth/constants.ts
+++ b/dictation_client/src/components/auth/constants.ts
@@ -36,7 +36,7 @@ export const TIERS = {
 export const UNAUTHORIZED_TO_CONTINUE_ERROR_CODES = [
   "E010209",
   "E010503",
-  "E10501",
+  "E010501",
 ];
 
 /**
diff --git a/dictation_client/src/components/header/loginedHeader.tsx b/dictation_client/src/components/header/loginedHeader.tsx
index 9f16a9d..86f5e68 100644
--- a/dictation_client/src/components/header/loginedHeader.tsx
+++ b/dictation_client/src/components/header/loginedHeader.tsx
@@ -3,7 +3,7 @@ import styles from "styles/app.module.scss";
 import { useDispatch, useSelector } from "react-redux";
 import { AppDispatch } from "app/store";
 import { useMsal } from "@azure/msal-react";
-import { clearToken } from "features/auth";
+import { clearToken, loadAccessToken } from "features/auth";
 import { useTranslation } from "react-i18next";
 import {
   getUserInfoAsync,
@@ -35,6 +35,7 @@ const LoginedHeader: React.FC<HeaderProps> = (props: HeaderProps) => {
 
   // メニューの代行操作表示制御
   const isDelegation = useSelector(selectDelegationAccessToken) !== null;
+  const accessToken = loadAccessToken();
   const filterMenus = getFilteredMenus(isDelegation);
 
   // Headerのユーザー情報を取得する
@@ -42,20 +43,26 @@ const LoginedHeader: React.FC<HeaderProps> = (props: HeaderProps) => {
   const userName = useSelector(selectUserName);
 
   useEffect(() => {
-    if (isUserNameEmpty) {
+    // ユーザー情報が空の場合、ユーザー情報を取得する（アクセストークンがある場合のみ）
+    // ログアウト時にユーザー情報とアクセストークンをクリアするため、失敗するそのタイミングでユーザー情報を取得しないようにする
+    if (accessToken !== null && isUserNameEmpty) {
       dispatch(getUserInfoAsync());
     }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [dispatch, isUserNameEmpty]);
 
   // ログアウト
   const onSignoutButton = useCallback(
     async () => {
       // ダイアログ確認
-      // eslint-disable-next-line no-alert
-      if (window.confirm(t(getTranslationID("common.message.displayDialog")))) {
-        instance.logoutRedirect({ postLogoutRedirectUri: "/" });
+      if (
+        !isDelegation &&
+        // eslint-disable-next-line no-alert
+        window.confirm(t(getTranslationID("common.message.displayDialog")))
+      ) {
         dispatch(clearToken());
         dispatch(clearUserInfo());
+        instance.logoutRedirect({ postLogoutRedirectUri: "/" });
       }
     },
     // eslint-disable-next-line react-hooks/exhaustive-deps
@@ -91,7 +98,11 @@ const LoginedHeader: React.FC<HeaderProps> = (props: HeaderProps) => {
           <img src={ac} alt="" className={styles.accountIcon} />
           <span>{userName}</span>
           {/* eslint-disable-next-line jsx-a11y/click-events-have-key-events, jsx-a11y/no-static-element-interactions */}
-          <span className={styles.accountSignout} onClick={onSignoutButton}>
+          <span
+            className={styles.accountSignout}
+            onClick={onSignoutButton}
+            style={{ pointerEvents: isDelegation ? "none" : "auto" }}
+          >
             <img src={logout} alt="" className={styles.accountIcon} />
             {t(getTranslationID("common.label.signOutButton"))}
           </span>
diff --git a/dictation_client/src/features/login/operations.ts b/dictation_client/src/features/login/operations.ts
index 07185ba..ffbf4e9 100644
--- a/dictation_client/src/features/login/operations.ts
+++ b/dictation_client/src/features/login/operations.ts
@@ -66,8 +66,7 @@ export const getUserInfoAsync = createAsyncThunk<
   // apiのConfigurationを取得する
   const { getState } = thunkApi;
   const state = getState() as RootState;
-  const { configuration } = state.auth;
-  const accessToken = getAccessToken(state.auth);
+  const { configuration, accessToken } = state.auth;
   const config = new Configuration(configuration);
   const usersApi = new UsersApi(config);