diff --git a/client/src/pages/Community.tsx b/client/src/pages/Community.tsx
index 2eb766e..1e09443 100644
--- a/client/src/pages/Community.tsx
+++ b/client/src/pages/Community.tsx
@@ -13,6 +13,7 @@ import { Eye, MessageCircle, ThumbsUp, Pin, Search, Info, Settings, User, LogOut
 import type { MediaOutlet, CommunityPost } from "@shared/schema";
 import { queryClient, apiRequest } from "@/lib/queryClient";
 import SearchModal from "@/components/SearchModal";
+import LoginModal from "@/components/LoginModal";
 
 export default function Community() {
   const [, params] = useRoute("/media/:slug/community");
@@ -22,6 +23,7 @@ export default function Community() {
   const [sortBy, setSortBy] = useState("latest");
   const [searchTerm, setSearchTerm] = useState("");
   const [isSearchModalOpen, setIsSearchModalOpen] = useState(false);
+  const [isLoginModalOpen, setIsLoginModalOpen] = useState(false);
   const [enlargedImage, setEnlargedImage] = useState<string | null>(null);
 
   const slug = params?.slug || '';
@@ -238,7 +240,15 @@ export default function Community() {
           
           <Dialog open={isNewPostOpen} onOpenChange={setIsNewPostOpen}>
             <DialogTrigger asChild>
-              <Button data-testid="button-new-post">
+              <Button 
+                onClick={(e) => {
+                  if (!isAuthenticated) {
+                    e.preventDefault();
+                    setIsLoginModalOpen(true);
+                  }
+                }}
+                data-testid="button-new-post"
+              >
                 글쓰기
               </Button>
             </DialogTrigger>
@@ -434,6 +444,11 @@ export default function Community() {
           </div>
         )}
       </main>
+
+      <LoginModal 
+        isOpen={isLoginModalOpen} 
+        onClose={() => setIsLoginModalOpen(false)} 
+      />
     </div>
   );
 }
diff --git a/client/src/pages/MediaOutlet.tsx b/client/src/pages/MediaOutlet.tsx
index 5804d26..c2e6ac7 100644
--- a/client/src/pages/MediaOutlet.tsx
+++ b/client/src/pages/MediaOutlet.tsx
@@ -253,36 +253,42 @@ export default function MediaOutlet() {
                 />
               </div>
               
+              <Button 
+                variant="ghost" 
+                size="sm"
+                onClick={() => setLocation("/auctions")}
+                data-testid="button-auctions"
+              >
+                Auctions
+              </Button>
+              
+              <Button 
+                variant="ghost" 
+                size="sm"
+                onClick={() => setLocation(`/media/${outlet.slug}/community`)}
+                data-testid="button-community"
+              >
+                Community
+              </Button>
+              
+              <Button 
+                variant="ghost" 
+                size="sm"
+                onClick={() => {
+                  if (isAuthenticated) {
+                    setIsChatbotOpen(true);
+                  } else {
+                    setIsLoginModalOpen(true);
+                  }
+                }}
+                data-testid="button-chatbot"
+              >
+                <MessageCircle className="h-4 w-4 mr-1" />
+                Chat
+              </Button>
+              
               {isAuthenticated && user ? (
                 <>
-                  <Button 
-                    variant="ghost" 
-                    size="sm"
-                    onClick={() => setLocation("/auctions")}
-                    data-testid="button-auctions"
-                  >
-                    Auctions
-                  </Button>
-                  
-                  <Button 
-                    variant="ghost" 
-                    size="sm"
-                    onClick={() => setLocation(`/media/${outlet.slug}/community`)}
-                    data-testid="button-community"
-                  >
-                    Community
-                  </Button>
-                  
-                  <Button 
-                    variant="ghost" 
-                    size="sm"
-                    onClick={() => setIsChatbotOpen(true)}
-                    data-testid="button-chatbot"
-                  >
-                    <MessageCircle className="h-4 w-4 mr-1" />
-                    Chat
-                  </Button>
-                  
                   <Button 
                     variant="ghost" 
                     size="sm"