diff --git a/apps/web/src/app/login/_hooks/usePostGuestLogin.ts b/apps/web/src/app/login/_hooks/usePostGuestLogin.ts
index 2a5254ef..2f7218ec 100644
--- a/apps/web/src/app/login/_hooks/usePostGuestLogin.ts
+++ b/apps/web/src/app/login/_hooks/usePostGuestLogin.ts
@@ -1,9 +1,10 @@
+import { WEBBRIDGE_MESSAGE_TYPE } from '@piki/core';
 import { useMutation, useQueryClient } from '@tanstack/react-query';
 import { useRouter } from 'next/navigation';
 
 import { setCookie } from '@/utils/cookie';
 import { getLoginRedirectPath } from '@/utils/loginRedirect';
-import { isWebview } from '@/utils/webBridge';
+import { WebBridge, isWebview } from '@/utils/webBridge';
 
 import { postGuestLogin } from '../_apis/postGuestLogin';
 
@@ -19,6 +20,10 @@ export const usePostGuestLogin = () => {
       if (isWebview() && data.accessToken && data.refreshToken) {
         setCookie('access_token', data.accessToken, { minutes: 15 });
         setCookie('refresh_token', data.refreshToken, { days: 14 });
+        WebBridge.postMessage({
+          type: WEBBRIDGE_MESSAGE_TYPE.WEB_REQ_TOKEN_REFRESHED,
+          payload: { accessToken: data.accessToken, refreshToken: data.refreshToken },
+        });
       }
 
       router.replace(getLoginRedirectPath());
diff --git a/apps/web/src/app/login/page.tsx b/apps/web/src/app/login/page.tsx
index 7c0ab547..6f0f8ecf 100644
--- a/apps/web/src/app/login/page.tsx
+++ b/apps/web/src/app/login/page.tsx
@@ -1,4 +1,10 @@
+import { cookies } from 'next/headers';
+import { redirect } from 'next/navigation';
+
 import PikiLogo from '@/assets/images/piki-logo.svg';
+import { ROUTES } from '@/consts/route';
+import { isTokenValid } from '@/utils/auth';
+import { isValidLoginRedirectPath } from '@/utils/loginRedirect';
 
 import LoginButtons from './_components/LoginButtons';
 
@@ -7,7 +13,17 @@ type LoginPageProps = {
 };
 
 async function LoginPage({ searchParams }: LoginPageProps) {
-  const { redirect, action } = await searchParams;
+  const { redirect: redirectParam, action } = await searchParams;
+
+  // 이미 유효한 세션이 있으면 로그인 페이지를 건너뜀 (게스트·소셜 모두)
+  // action이 있으면 세션 만료/소셜 오류 등 명시적 케이스 → 건너뛰지 않음
+  if (!action) {
+    const cookieStore = await cookies();
+    const accessToken = cookieStore.get('access_token')?.value;
+    if (accessToken && isTokenValid(accessToken)) {
+      redirect(isValidLoginRedirectPath(redirectParam) ? redirectParam : ROUTES.HOME);
+    }
+  }
 
   return (
     <div className="flex min-h-dvh flex-col items-center bg-gray-50 px-4 pt-padding-top pb-10">
@@ -19,7 +35,7 @@ async function LoginPage({ searchParams }: LoginPageProps) {
       </div>
 
       <div className="mt-[90px] w-full">
-        <LoginButtons redirect={redirect ?? null} action={action ?? null} />
+        <LoginButtons redirect={redirectParam ?? null} action={action ?? null} />
       </div>
     </div>
   );