diff --git a/src/auth/auth.controller.ts b/src/auth/auth.controller.ts
index 3ce5151..94652f4 100644
--- a/src/auth/auth.controller.ts
+++ b/src/auth/auth.controller.ts
@@ -34,4 +34,9 @@ export class AuthController {
     ) {
         return await this.authService.checkSejongStudent(body, userId);
     }
+
+    @Post('refresh')
+    public refreshTokens(@Body('refreshToken') refreshToken: string) {
+        return this.authService.sendTokens(refreshToken);
+    }
 }
diff --git a/src/auth/auth.service.spec.ts b/src/auth/auth.service.spec.ts
index 7d95968..0555787 100644
--- a/src/auth/auth.service.spec.ts
+++ b/src/auth/auth.service.spec.ts
@@ -62,7 +62,7 @@ describe('AuthService', () => {
         it('should generate access token', function () {
             mockJwtService.sign.mockResolvedValue('jwt-token');
 
-            service.generateAccessToken(user);
+            service.generateAccessToken(user.userId);
 
             expect(mockJwtService.sign).toHaveBeenCalledWith({
                 userId: user.userId,
diff --git a/src/auth/auth.service.ts b/src/auth/auth.service.ts
index 5b5858d..963c3d9 100644
--- a/src/auth/auth.service.ts
+++ b/src/auth/auth.service.ts
@@ -27,8 +27,8 @@ export class AuthService {
             user = await this.userService.createUser(providerId);
             await this.totalService.createTotalPoint(user.userId);
         }
-        const accessToken = this.generateAccessToken(user);
-        const refreshToken = this.generateRefreshToken(user);
+        const accessToken = this.generateAccessToken(user.userId);
+        const refreshToken = this.generateRefreshToken(user.userId);
         return { accessToken, refreshToken, isMember };
     }
 
@@ -42,16 +42,16 @@ export class AuthService {
         );
     }
 
-    generateAccessToken(user: User): string {
+    generateAccessToken(userId: string): string {
         return this.jwtService.sign({
-            userId: user.userId,
+            userId: userId,
         });
     }
 
-    generateRefreshToken(user: User): string {
+    generateRefreshToken(userId: string): string {
         return this.jwtService.sign(
             {
-                userId: user.userId,
+                userId: userId,
             },
             {
                 secret: this.configService.get('JWT_REFRESH_SECRET'),
@@ -143,4 +143,25 @@ export class AuthService {
             return { isAuthorized: isSejongJson.result.is_auth };
         }
     }
+
+    public sendTokens(refreshToken: string) {
+        const payload = this.validateRefreshToken(refreshToken);
+
+        return {
+            accessToken: this.generateAccessToken(payload.userId),
+            refreshToken: this.generateRefreshToken(payload.userId),
+        };
+    }
+
+    public validateRefreshToken(refreshToken: string) {
+        try {
+            return this.jwtService.verify(refreshToken, {
+                secret: this.configService.get('JWT_REFRESH_SECRET'),
+            });
+        } catch (e) {
+            if (e instanceof TokenExpiredError) {
+                throw new UnauthorizedException();
+            }
+        }
+    }
 }