diff --git a/backend/src/api/routes/documents.py b/backend/src/api/routes/documents.py
index 5c597e8..0654d06 100644
--- a/backend/src/api/routes/documents.py
+++ b/backend/src/api/routes/documents.py
@@ -510,6 +510,7 @@ async def get_document_content(
 @router.get("/{document_id}/pdf")
 async def get_document_pdf(
     document_id: str,
+    token: Optional[str] = Query(None),
     current_user: User = Depends(get_current_active_user),
     db: AsyncSession = Depends(get_db)
 ):
diff --git a/frontend/search.html b/frontend/search.html
index c7c7006..2a0d325 100644
--- a/frontend/search.html
+++ b/frontend/search.html
@@ -10,6 +10,12 @@
     
     <!-- PDF.js 라이브러리 -->
     <script src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.min.js"></script>
+    <script>
+        // PDF.js 워커 설정 (전역)
+        if (typeof pdfjsLib !== 'undefined') {
+            pdfjsLib.GlobalWorkerOptions.workerSrc = 'https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.worker.min.js';
+        }
+    </script>
     
     <style>
         [x-cloak] { display: none !important; }
@@ -467,15 +473,6 @@
                             <i class="fas fa-file-pdf mr-2 text-red-600"></i>PDF 미리보기
                         </div>
                         <div class="flex items-center space-x-2">
-                            <button @click="zoomOut()" 
-                                    class="px-2 py-1 bg-gray-600 text-white rounded text-xs hover:bg-gray-700">
-                                <i class="fas fa-search-minus"></i>
-                            </button>
-                            <span class="text-xs text-gray-600" x-text="`${Math.round(pdfZoom * 100)}%`"></span>
-                            <button @click="zoomIn()" 
-                                    class="px-2 py-1 bg-gray-600 text-white rounded text-xs hover:bg-gray-700">
-                                <i class="fas fa-search-plus"></i>
-                            </button>
                             <button @click="searchInPdf()" 
                                     class="px-3 py-1 bg-blue-600 text-white rounded text-xs hover:bg-blue-700">
                                 <i class="fas fa-search mr-1"></i>PDF에서 검색
@@ -485,54 +482,22 @@
                     
                     <!-- PDF 뷰어 컨테이너 -->
                     <div class="border rounded-lg overflow-hidden bg-gray-100 relative" style="height: 500px;">
-                        <!-- PDF.js 뷰어 -->
-                        <div id="pdfViewerContainer" class="w-full h-full overflow-auto bg-gray-200">
-                            <div x-show="pdfLoading" class="flex items-center justify-center h-full">
-                                <div class="text-center">
-                                    <i class="fas fa-spinner fa-spin text-2xl text-gray-500 mb-2"></i>
-                                    <p class="text-gray-600">PDF를 로드하는 중...</p>
-                                </div>
-                            </div>
-                            
-                            <canvas id="pdfCanvas" 
-                                    x-show="!pdfLoading && !pdfError"
-                                    class="mx-auto shadow-lg"
-                                    style="display: block; margin: 20px auto;"></canvas>
-                            
-                            <div x-show="pdfError" class="flex items-center justify-center h-full text-gray-500">
-                                <div class="text-center">
-                                    <i class="fas fa-exclamation-triangle text-2xl mb-2"></i>
-                                    <p>PDF를 로드할 수 없습니다</p>
-                                    <button @click="openResult(previewResult)" 
-                                            class="mt-2 px-3 py-1 bg-blue-600 text-white rounded text-sm">
-                                        뷰어에서 열기
-                                    </button>
-                                </div>
-                            </div>
-                        </div>
+                        <!-- PDF iframe 뷰어 -->
+                        <iframe :src="`/api/documents/${previewResult?.document_id}/pdf`" 
+                                class="w-full h-full border-0"
+                                x-show="!pdfError"
+                                @error="pdfError = true">
+                        </iframe>
                         
-                        <!-- 페이지 네비게이션 -->
-                        <div x-show="!pdfLoading && !pdfError && pdfTotalPages > 1" 
-                             class="absolute bottom-4 left-1/2 transform -translate-x-1/2 bg-black bg-opacity-75 text-white px-4 py-2 rounded-lg flex items-center space-x-3">
-                            <button @click="prevPage()" 
-                                    :disabled="pdfCurrentPage <= 1"
-                                    class="px-2 py-1 bg-gray-600 rounded text-xs hover:bg-gray-500 disabled:opacity-50 disabled:cursor-not-allowed">
-                                <i class="fas fa-chevron-left"></i>
-                            </button>
-                            <span class="text-sm">
-                                <input type="number" 
-                                       x-model="pdfCurrentPage" 
-                                       @change="goToPage(pdfCurrentPage)"
-                                       :min="1" 
-                                       :max="pdfTotalPages"
-                                       class="w-12 text-center bg-transparent border-b border-gray-400 text-white text-xs">
-                                / <span x-text="pdfTotalPages"></span>
-                            </span>
-                            <button @click="nextPage()" 
-                                    :disabled="pdfCurrentPage >= pdfTotalPages"
-                                    class="px-2 py-1 bg-gray-600 rounded text-xs hover:bg-gray-500 disabled:opacity-50 disabled:cursor-not-allowed">
-                                <i class="fas fa-chevron-right"></i>
-                            </button>
+                        <div x-show="pdfError" class="flex items-center justify-center h-full text-gray-500">
+                            <div class="text-center">
+                                <i class="fas fa-exclamation-triangle text-2xl mb-2"></i>
+                                <p>PDF를 로드할 수 없습니다</p>
+                                <button @click="openResult(previewResult)" 
+                                        class="mt-2 px-3 py-1 bg-blue-600 text-white rounded text-sm">
+                                    뷰어에서 열기
+                                </button>
+                            </div>
                         </div>
                     </div>
                 </div>
diff --git a/frontend/static/js/search.js b/frontend/static/js/search.js
index d37dd46..deb62c6 100644
--- a/frontend/static/js/search.js
+++ b/frontend/static/js/search.js
@@ -26,13 +26,6 @@ window.searchApp = function() {
         previewLoading: false,
         pdfError: false,
         
-        // PDF 뷰어 상태
-        pdfLoading: false,
-        pdfDoc: null,
-        pdfCurrentPage: 1,
-        pdfTotalPages: 0,
-        pdfZoom: 1.0,
-        
         // HTML 뷰어 상태
         htmlLoading: false,
         htmlRawMode: false,
@@ -207,26 +200,11 @@ window.searchApp = function() {
             
             try {
                 // 타입별 미리보기 로드
-                if (result.type === 'document_content' && result.highlight_info?.has_pdf) {
-                    // PDF 미리보기
-                    await this.loadPdfPreview(result.document_id);
-                } else if ((result.type === 'document' || result.type === 'document_content') && !result.highlight_info?.has_pdf) {
+                if ((result.type === 'document' || result.type === 'document_content') && !result.highlight_info?.has_pdf) {
                     // HTML 문서 미리보기
                     await this.loadHtmlPreview(result.document_id);
-                } else if (result.type === 'note') {
-                    // 노트 미리보기 - 전체 내용 로드
-                    const fullContent = await this.loadFullContent(result);
-                    if (fullContent) {
-                        this.previewResult = { ...result, content: fullContent };
-                    }
-                } else if (result.type === 'memo') {
-                    // 메모 미리보기 - 전체 내용 로드
-                    const fullContent = await this.loadFullContent(result);
-                    if (fullContent) {
-                        this.previewResult = { ...result, content: fullContent };
-                    }
                 } else {
-                    // 기타 타입 - 기본 내용 로드
+                    // 기타 타입 - 전체 내용 로드
                     const fullContent = await this.loadFullContent(result);
                     if (fullContent) {
                         this.previewResult = { ...result, content: fullContent };
@@ -314,137 +292,12 @@ window.searchApp = function() {
             this.previewLoading = false;
             this.pdfError = false;
             
-            // PDF 리소스 정리
-            this.pdfDoc = null;
-            this.pdfCurrentPage = 1;
-            this.pdfTotalPages = 0;
-            this.pdfZoom = 1.0;
-            this.pdfLoading = false;
-            
             // HTML 리소스 정리
             this.htmlLoading = false;
             this.htmlRawMode = false;
             this.htmlSourceCode = '';
         },
 
-        // PDF 미리보기 로드
-        async loadPdfPreview(documentId) {
-            this.pdfLoading = true;
-            this.pdfError = false;
-            
-            try {
-                // PDF.js 워커 설정
-                if (typeof pdfjsLib !== 'undefined') {
-                    pdfjsLib.GlobalWorkerOptions.workerSrc = 'https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.worker.min.js';
-                }
-                
-                const pdfUrl = `/api/documents/${documentId}/pdf`;
-                
-                // PDF 문서 로드
-                const loadingTask = pdfjsLib.getDocument({
-                    url: pdfUrl,
-                    httpHeaders: {
-                        'Authorization': `Bearer ${localStorage.getItem('token')}`
-                    }
-                });
-                
-                this.pdfDoc = await loadingTask.promise;
-                this.pdfTotalPages = this.pdfDoc.numPages;
-                this.pdfCurrentPage = 1;
-                
-                console.log('PDF 로드 완료:', this.pdfTotalPages, '페이지');
-                
-                // 첫 페이지 렌더링
-                await this.renderPdfPage(1);
-                
-            } catch (error) {
-                console.error('PDF 로드 실패:', error);
-                this.pdfError = true;
-            } finally {
-                this.pdfLoading = false;
-            }
-        },
-
-        // PDF 페이지 렌더링
-        async renderPdfPage(pageNum) {
-            if (!this.pdfDoc) return;
-            
-            try {
-                const page = await this.pdfDoc.getPage(pageNum);
-                const canvas = document.getElementById('pdfCanvas');
-                const context = canvas.getContext('2d');
-                
-                // 뷰포트 설정 (줌 적용)
-                const viewport = page.getViewport({ scale: this.pdfZoom });
-                
-                // 캔버스 크기 설정
-                canvas.height = viewport.height;
-                canvas.width = viewport.width;
-                
-                // 고해상도 디스플레이 지원
-                const devicePixelRatio = window.devicePixelRatio || 1;
-                canvas.style.width = viewport.width + 'px';
-                canvas.style.height = viewport.height + 'px';
-                canvas.width = viewport.width * devicePixelRatio;
-                canvas.height = viewport.height * devicePixelRatio;
-                context.scale(devicePixelRatio, devicePixelRatio);
-                
-                // 페이지 렌더링
-                const renderContext = {
-                    canvasContext: context,
-                    viewport: viewport
-                };
-                
-                await page.render(renderContext).promise;
-                console.log('페이지 렌더링 완료:', pageNum);
-                
-            } catch (error) {
-                console.error('페이지 렌더링 실패:', error);
-                this.pdfError = true;
-            }
-        },
-
-        // 줌 인
-        async zoomIn() {
-            if (this.pdfZoom < 3.0) {
-                this.pdfZoom += 0.25;
-                await this.renderPdfPage(this.pdfCurrentPage);
-            }
-        },
-
-        // 줌 아웃
-        async zoomOut() {
-            if (this.pdfZoom > 0.5) {
-                this.pdfZoom -= 0.25;
-                await this.renderPdfPage(this.pdfCurrentPage);
-            }
-        },
-
-        // 이전 페이지
-        async prevPage() {
-            if (this.pdfCurrentPage > 1) {
-                this.pdfCurrentPage--;
-                await this.renderPdfPage(this.pdfCurrentPage);
-            }
-        },
-
-        // 다음 페이지
-        async nextPage() {
-            if (this.pdfCurrentPage < this.pdfTotalPages) {
-                this.pdfCurrentPage++;
-                await this.renderPdfPage(this.pdfCurrentPage);
-            }
-        },
-
-        // 특정 페이지로 이동
-        async goToPage(pageNum) {
-            const page = parseInt(pageNum);
-            if (page >= 1 && page <= this.pdfTotalPages) {
-                this.pdfCurrentPage = page;
-                await this.renderPdfPage(this.pdfCurrentPage);
-            }
-        },
-
         // HTML 미리보기 로드
         async loadHtmlPreview(documentId) {
             this.htmlLoading = true;