diff --git a/src/api/auth/auth.ts b/src/api/auth/auth.ts
index 6860d30..9d87926 100644
--- a/src/api/auth/auth.ts
+++ b/src/api/auth/auth.ts
@@ -8,6 +8,7 @@ import type {
   ILoginResponse,
   ISignUpRequest,
   ISignUpResponse,
+  ITokenRefreshResponse,
 } from "../../types/auth/auth";
 
 import { axiosInstance } from "@/lib/axiosInstance";
@@ -43,6 +44,14 @@ export const signUp = async (
   return responseData;
 };
 
+// 토큰 재발급
+export const reissueToken = async (): Promise<
+  ICommonResponse<ITokenRefreshResponse>
+> => {
+  const { data } = await axiosInstance.post("/api/auth/reissue");
+  return data;
+};
+
 // 로그인
 export const login = async (
   data: ILoginRequest,
diff --git a/src/lib/axiosInstance.ts b/src/lib/axiosInstance.ts
index 22a357b..0342a6d 100644
--- a/src/lib/axiosInstance.ts
+++ b/src/lib/axiosInstance.ts
@@ -1,12 +1,20 @@
-import axios from "axios";
+import axios, { type AxiosRequestConfig } from "axios";
 
-export const axiosInstance = axios.create({
+import useAuthStore from "@/store/useAuthStore";
+
+const axiosConfig: AxiosRequestConfig = {
   baseURL: import.meta.env.VITE_API_BASE_URL,
   withCredentials: true,
   headers: {
     "Content-Type": "application/json",
   },
-});
+};
+
+// 일반 API 요청용
+export const axiosInstance = axios.create(axiosConfig);
+
+// 토큰 재발급 전용
+export const authInstance = axios.create(axiosConfig);
 
 axiosInstance.interceptors.request.use(
   (config) => {
@@ -22,11 +30,75 @@ axiosInstance.interceptors.request.use(
   },
 );
 
+let isRefreshing = false;
+let refreshSubscribers: ((token: string) => void)[] = [];
+
+// 대기 요청 처리
+const onRefreshed = (accessToken: string) => {
+  refreshSubscribers.forEach((callback) => callback(accessToken));
+  refreshSubscribers = [];
+};
+
+const addRefreshSubscriber = (callback: (token: string) => void) => {
+  refreshSubscribers.push(callback);
+};
+
 axiosInstance.interceptors.response.use(
   (response) => {
     return response;
   },
-  (error) => {
+  async (error) => {
+    const originalRequest = error.config;
+
+    // 401 에러 감지
+    if (error.response?.status === 401) {
+      // 재발급 진행 중: 대기열 등록
+      if (isRefreshing) {
+        return new Promise((resolve) => {
+          addRefreshSubscriber((accessToken: string) => {
+            originalRequest.headers.Authorization = `Bearer ${accessToken}`;
+            resolve(axiosInstance(originalRequest));
+          });
+        });
+      }
+
+      // 재발급 실패: 로그아웃
+      if (
+        originalRequest.url?.includes("/api/auth/reissue") ||
+        originalRequest._retry
+      ) {
+        useAuthStore.getState().logout();
+        return Promise.reject(error);
+      }
+
+      // 첫 401: 재발급 시도
+      originalRequest._retry = true;
+      isRefreshing = true;
+
+      try {
+        const { data } = await authInstance.post("/api/auth/reissue");
+
+        const newAccessToken = data.data.accessToken;
+        localStorage.setItem("accessToken", newAccessToken);
+
+        // 대기 요청 일괄 처리
+        onRefreshed(newAccessToken);
+
+        // 현재 요청 재시도
+        originalRequest.headers.Authorization = `Bearer ${newAccessToken}`;
+        return axiosInstance(originalRequest);
+      } catch (refreshError) {
+        // 재발급 실패: 로그아웃
+        console.error("Token reissue failed:", refreshError);
+        useAuthStore.getState().logout();
+        return Promise.reject(refreshError);
+      } finally {
+        // 상태 초기화
+        isRefreshing = false;
+        refreshSubscribers = [];
+      }
+    }
+
     console.error("API Error:", error);
     return Promise.reject(error);
   },
diff --git a/src/types/auth/auth.ts b/src/types/auth/auth.ts
index aa8c8a1..4909acd 100644
--- a/src/types/auth/auth.ts
+++ b/src/types/auth/auth.ts
@@ -42,3 +42,15 @@ export interface ILoginResponse {
   accessToken: string;
   accessTokenExpiresIn: number;
 }
+
+// 토큰 재발급 요청 타입
+export interface ITokenRefreshRequest {
+  refreshToken: string;
+}
+
+// 토큰 재발급 응답 타입
+export interface ITokenRefreshResponse {
+  grantType: string;
+  accessToken: string;
+  accessTokenExpiresIn: number;
+}
diff --git a/vite.config.ts b/vite.config.ts
index c334a94..e1212f2 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -8,6 +8,8 @@ export default defineConfig(({ mode }) => {
 
   return {
     plugins: [react(), svgr({ include: "**/*.svg?react" }), tailwindcss()],
+
+    // 개발 서버 및 프록시 설정
     server: {
       host: "0.0.0.0",
       port: 5173,
@@ -18,10 +20,39 @@ export default defineConfig(({ mode }) => {
         },
       },
     },
+
+    // 경로 별칭
     resolve: {
       alias: {
         "@": "/src",
       },
     },
+
+    // 배포 시 콘솔 로그 제거
+    esbuild: {
+      drop: mode === "production" ? ["console", "debugger"] : [],
+    },
+
+    // 빌드 최적화
+    build: {
+      chunkSizeWarningLimit: 1000, // 청크 크기 경고 한도 상향
+      rollupOptions: {
+        output: {
+          // 라이브러리 및 코드 분할
+          manualChunks(id) {
+            if (id.includes("node_modules")) {
+              if (
+                id.includes("react") ||
+                id.includes("react-dom") ||
+                id.includes("react-router-dom")
+              ) {
+                return "react-vendor"; // 리액트 관련 코어
+              }
+              return "vendor"; // 기타 라이브러리
+            }
+          },
+        },
+      },
+    },
   };
 });