diff --git a/src/apis/client.ts b/src/apis/client.ts
index 426b7c4..8ed72ee 100644
--- a/src/apis/client.ts
+++ b/src/apis/client.ts
@@ -2,28 +2,11 @@ import axios from 'axios';
 
 import useAuthStore from '@/stores/authStore';
 
-import { getNewToken } from './auth';
-
 const client = axios.create({
   baseURL: import.meta.env.VITE_API_URL,
   headers: { 'Content-Type': 'application/json' },
 });
 
-let isRefreshing = false;
-
-const callReissue = async () => {
-  try {
-    const response = await getNewToken();
-    if(response?.status !== 200) throw new Error('error while fetching newToken');
-    const newToken = response?.data.data.accessToken;
-    return newToken;
-  } catch (e) {
-    return Promise.reject(e);
-  }
-};
-
-let retry = false;
-
 client.interceptors.request.use(
   (config) => {
     const accessToken = useAuthStore.getState().accessToken;
@@ -39,36 +22,31 @@ client.interceptors.request.use(
 client.interceptors.response.use(
   (response) => response,
   async (error) => {
-    const setAccessToken = useAuthStore.getState().setAccessToken;
     const logout = useAuthStore.getState().logout;
     const isLoggedIn = useAuthStore.getState().isLoggedIn;
 
     const originalRequest = error.config;
 
-    if (!originalRequest || originalRequest.url === '/auth/reissue') {
+    if (!originalRequest || originalRequest.url === '/api/reissue') {
       if (isLoggedIn) logout();
       return Promise.reject(error);
     }
 
-    if ((error.response?.status === 401 || error.response?.status === 403) && !retry) {
-      retry = true;
-      if (isRefreshing) {
-        if (isLoggedIn) logout();
-      } else {
-        isRefreshing = true;
-        try {
-          const newToken = await callReissue();
-          setAccessToken(newToken);
-          isRefreshing = false;
-          originalRequest.headers.Authorization = `Bearer ${newToken}`;
-          return client(originalRequest);
-        } catch (e) {
-          isRefreshing = false;
-          if (isLoggedIn) logout();
-          return Promise.reject(e);
-        }
+    if (
+      (error.response?.status === 401 || error.response?.status === 403) &&
+      !originalRequest._retry
+    ) {
+      originalRequest._retry = true;
+
+      try {
+        const newToken = await useAuthStore.getState().refreshToken();
+        originalRequest.headers.Authorization = `Bearer ${newToken}`;
+        return client(originalRequest);
+      } catch (e) {
+        return Promise.reject(e);
       }
     }
+
     return Promise.reject(error);
   },
 );
diff --git a/src/hooks/useServerSentEvents.tsx b/src/hooks/useServerSentEvents.tsx
index 3795fa9..fc2fc5d 100644
--- a/src/hooks/useServerSentEvents.tsx
+++ b/src/hooks/useServerSentEvents.tsx
@@ -5,7 +5,6 @@ import useAuthStore from '@/stores/authStore';
 import useToastStore from '@/stores/toastStore';
 import { useNavigate } from 'react-router';
 import useNotificationStore from '@/stores/notificationStore';
-import { getNewToken } from '@/apis/auth';
 
 interface MessageEventData {
   title: string;
@@ -19,7 +18,6 @@ export const useServerSentEvents = () => {
   // const recallCountRef = useRef(1);
 
   const accessToken = useAuthStore((state) => state.accessToken);
-  const setAccessToken = useAuthStore((state) => state.setAccessToken);
   const sourceRef = useRef<EventSourcePolyfill | null>(null);
 
   const setToastActive = useToastStore((state) => state.setToastActive);
@@ -41,27 +39,17 @@ export const useServerSentEvents = () => {
     }
   };
 
-  // 토큰 재발급 함수
-  const callReissue = async () => {
-    try {
-      const response = await getNewToken();
-      if (response?.status !== 200) throw new Error('error while fetching newToken');
-      const newToken = response?.data.data.accessToken;
-      return setAccessToken(newToken);
-    } catch (e) {
-      return Promise.reject(e);
-    }
-  };
-
   useEffect(() => {
     if (!accessToken) {
-      console.log('로그인 정보 확인불가');
+      // console.log('로그인 정보 확인불가');
       return;
     }
 
     const connectSSE = () => {
+      const accessToken = useAuthStore.getState().accessToken;
+
       try {
-        console.log('구독 시작');
+        // console.log('구독 시작');
         sourceRef.current = new EventSourcePolyfill(
           `${import.meta.env.VITE_API_URL}/api/notifications/sub`,
           {
@@ -77,11 +65,15 @@ export const useServerSentEvents = () => {
           handleOnMessage(event.data);
         };
 
-        sourceRef.current.onerror = (event) => {
+        sourceRef.current.onerror = async (event) => {
           console.log(event);
           const errorEvent = event as unknown as { status?: number };
           if (errorEvent.status === 401) {
-            callReissue();
+            try {
+              await useAuthStore.getState().refreshToken();
+            } catch (error) {
+              console.log('다른 api에서 리프레시 토큰 호출중입니다.');
+            }
             closeSSE();
             reconnect = setTimeout(connectSSE, 5000);
           } else {
@@ -97,7 +89,7 @@ export const useServerSentEvents = () => {
     connectSSE();
 
     return () => {
-      console.log('컴포넌트 언마운트로 인한 구독해제');
+      // console.log('컴포넌트 언마운트로 인한 구독해제');
       closeSSE();
     };
   }, [accessToken]);
diff --git a/src/layouts/PrivateRoute.tsx b/src/layouts/PrivateRoute.tsx
index fd9a26d..95fb2fd 100644
--- a/src/layouts/PrivateRoute.tsx
+++ b/src/layouts/PrivateRoute.tsx
@@ -6,7 +6,7 @@ import { useServerSentEvents } from '@/hooks/useServerSentEvents';
 import Toast from '@/components/Toast';
 
 export default function PrivateRoute() {
-  useServerSentEvents();
+  // useServerSentEvents();
   const isLoggedIn = useAuthStore((state) => state.isLoggedIn);
   const navigate = useNavigate();
 
diff --git a/src/stores/authStore.ts b/src/stores/authStore.ts
index 7557b97..9b5530a 100644
--- a/src/stores/authStore.ts
+++ b/src/stores/authStore.ts
@@ -1,6 +1,7 @@
 import { create } from 'zustand';
 import { persist, createJSONStorage } from 'zustand/middleware';
 import useThemeStore from './themeStore';
+import { getNewToken } from '@/apis/auth';
 
 interface AuthStore {
   isLoggedIn: boolean;
@@ -12,11 +13,14 @@ interface AuthStore {
   setZipCode: (zipCode: string) => void;
   setAccessToken: (accessToken: string) => void;
   setIsAdmin: () => void;
+  isRefreshing: boolean;
+  refreshPromise: Promise<string> | null;
+  refreshToken: () => Promise<string>;
 }
 
 const useAuthStore = create(
   persist<AuthStore>(
-    (set) => ({
+    (set, get) => ({
       isLoggedIn: false,
       accessToken: '',
       zipCode: '',
@@ -40,6 +44,30 @@ const useAuthStore = create(
       setZipCode: (zipCode) => set({ zipCode: zipCode }),
       setAccessToken: (accessToken) => set({ accessToken: accessToken }),
       setIsAdmin: () => set({ isAdmin: true }),
+      isRefreshing: false,
+      refreshPromise: null,
+      refreshToken: async () => {
+        // 이미 재발급 중이면 진행 중인 Promise 반환
+        if (get().isRefreshing && get().refreshPromise) {
+          return get().refreshPromise;
+        }
+        const refreshPromise = getNewToken()
+          .then((response) => {
+            if (response?.status !== 200) throw new Error('Token refresh failed');
+            const newToken = response?.data.data.accessToken;
+            set({ accessToken: newToken, isRefreshing: false, refreshPromise: null });
+            return newToken;
+          })
+          .catch((error) => {
+            set({ isRefreshing: false, refreshPromise: null });
+            // 재발급 실패 시 로그아웃
+            if (get().isLoggedIn) get().logout();
+            throw error;
+          });
+
+        set({ isRefreshing: true, refreshPromise });
+        return refreshPromise;
+      },
     }),
     {
       name: 'userInfo',