diff --git a/app/Http/Controllers/Api/Admin/ApprovalApiController.php b/app/Http/Controllers/Api/Admin/ApprovalApiController.php
index 639c21b2..574b0fd2 100644
--- a/app/Http/Controllers/Api/Admin/ApprovalApiController.php
+++ b/app/Http/Controllers/Api/Admin/ApprovalApiController.php
@@ -494,6 +494,34 @@ public function badgeCounts(): JsonResponse
         return response()->json(['success' => true, 'data' => $counts]);
     }
 
+    /**
+     * 완료함 읽음 처리 (일괄)
+     */
+    public function markCompletedAsRead(): JsonResponse
+    {
+        $count = $this->service->markCompletedAsRead(auth()->id());
+
+        return response()->json([
+            'success' => true,
+            'message' => $count > 0 ? "{$count}건 읽음 처리되었습니다." : '새로운 완료 건이 없습니다.',
+            'data' => ['marked_count' => $count],
+        ]);
+    }
+
+    /**
+     * 개별 문서 기안자 읽음 처리
+     */
+    public function markReadSingle(int $id): JsonResponse
+    {
+        $approval = $this->service->getApproval($id);
+
+        if ($approval->drafter_id === auth()->id() && ! $approval->drafter_read_at) {
+            $approval->update(['drafter_read_at' => now()]);
+        }
+
+        return response()->json(['success' => true]);
+    }
+
     // =========================================================================
     // 첨부파일
     // =========================================================================
diff --git a/app/Models/Approvals/Approval.php b/app/Models/Approvals/Approval.php
index af5b5053..a563e743 100644
--- a/app/Models/Approvals/Approval.php
+++ b/app/Models/Approvals/Approval.php
@@ -20,6 +20,7 @@ class Approval extends Model
         'attachments' => 'array',
         'drafted_at' => 'datetime',
         'completed_at' => 'datetime',
+        'drafter_read_at' => 'datetime',
         'current_step' => 'integer',
         'is_urgent' => 'boolean',
     ];
@@ -38,6 +39,7 @@ class Approval extends Model
         'department_id',
         'drafted_at',
         'completed_at',
+        'drafter_read_at',
         'current_step',
         'attachments',
         'recall_reason',
diff --git a/app/Providers/ViewServiceProvider.php b/app/Providers/ViewServiceProvider.php
index e8524567..578e6ae7 100644
--- a/app/Providers/ViewServiceProvider.php
+++ b/app/Providers/ViewServiceProvider.php
@@ -78,6 +78,7 @@ public function boot(): void
                     $menuBadges['byUrl']['/approval-mgmt/pending'] = ['count' => $counts['pending'], 'color' => '#ef4444'];
                     $menuBadges['byUrl']['/approval-mgmt/drafts'] = ['count' => $counts['draft'], 'color' => '#3b82f6'];
                     $menuBadges['byUrl']['/approval-mgmt/references'] = ['count' => $counts['reference_unread'], 'color' => '#10b981'];
+                    $menuBadges['byUrl']['/approval-mgmt/completed'] = ['count' => $counts['completed_unread'], 'color' => '#f59e0b'];
                 } catch (\Throwable $e) {
                     // 테이블 미존재 등 예외 무시
                 }
diff --git a/app/Services/ApprovalService.php b/app/Services/ApprovalService.php
index 625f041a..0da70582 100644
--- a/app/Services/ApprovalService.php
+++ b/app/Services/ApprovalService.php
@@ -303,6 +303,7 @@ public function approve(int $id, ?string $comment = null): Approval
                 $approval->update([
                     'status' => Approval::STATUS_APPROVED,
                     'completed_at' => now(),
+                    'drafter_read_at' => null,
                     'updated_by' => auth()->id(),
                 ]);
 
@@ -344,6 +345,7 @@ public function reject(int $id, string $comment): Approval
             $approval->update([
                 'status' => Approval::STATUS_REJECTED,
                 'completed_at' => now(),
+                'drafter_read_at' => null,
                 'updated_by' => auth()->id(),
             ]);
 
@@ -507,6 +509,7 @@ public function preDecide(int $id, ?string $comment = null): Approval
             $approval->update([
                 'status' => Approval::STATUS_APPROVED,
                 'completed_at' => now(),
+                'drafter_read_at' => null,
                 'updated_by' => auth()->id(),
             ]);
 
@@ -753,13 +756,30 @@ public function getBadgeCounts(int $userId): array
             ->where('is_read', false)
             ->count();
 
+        $completedUnreadCount = Approval::where('drafter_id', $userId)
+            ->whereIn('status', [Approval::STATUS_APPROVED, Approval::STATUS_REJECTED])
+            ->whereNull('drafter_read_at')
+            ->count();
+
         return [
             'pending' => $pendingCount,
             'draft' => $draftCount,
             'reference_unread' => $referenceUnreadCount,
+            'completed_unread' => $completedUnreadCount,
         ];
     }
 
+    /**
+     * 완료함 미읽음 일괄 읽음 처리
+     */
+    public function markCompletedAsRead(int $userId): int
+    {
+        return Approval::where('drafter_id', $userId)
+            ->whereIn('status', [Approval::STATUS_APPROVED, Approval::STATUS_REJECTED])
+            ->whereNull('drafter_read_at')
+            ->update(['drafter_read_at' => now()]);
+    }
+
     // =========================================================================
     // Private 헬퍼
     // =========================================================================
diff --git a/resources/views/approvals/completed.blade.php b/resources/views/approvals/completed.blade.php
index 374bab2d..c9258c9d 100644
--- a/resources/views/approvals/completed.blade.php
+++ b/resources/views/approvals/completed.blade.php
@@ -39,12 +39,20 @@ class="w-full px-4 py-2 border border-gray-300 rounded-lg focus:outline-none foc
 <script>
 document.addEventListener('DOMContentLoaded', function() {
     loadCompleted();
+    markCompletedAsRead();
     document.getElementById('filterForm').addEventListener('submit', function(e) {
         e.preventDefault();
         loadCompleted();
     });
 });
 
+function markCompletedAsRead() {
+    fetch('/api/admin/approvals/mark-completed-read', {
+        method: 'POST',
+        headers: { 'Accept': 'application/json', 'X-CSRF-TOKEN': '{{ csrf_token() }}' }
+    }).catch(() => {});
+}
+
 function loadCompleted(page = 1) {
     const form = document.getElementById('filterForm');
     const params = new URLSearchParams(new FormData(form));
diff --git a/resources/views/approvals/show.blade.php b/resources/views/approvals/show.blade.php
index 1cbaf3d1..91e93c8f 100644
--- a/resources/views/approvals/show.blade.php
+++ b/resources/views/approvals/show.blade.php
@@ -237,6 +237,14 @@ class="bg-red-600 hover:bg-red-700 text-white px-6 py-2 rounded-lg transition te
 
 @push('scripts')
 <script>
+{{-- 기안자가 완료 문서 열람 시 읽음 처리 --}}
+@if($approval->drafter_id === auth()->id() && in_array($approval->status, ['approved', 'rejected']) && !$approval->drafter_read_at)
+    fetch('/api/admin/approvals/{{ $approval->id }}/mark-read-single', {
+        method: 'POST',
+        headers: { 'Accept': 'application/json', 'X-CSRF-TOKEN': '{{ csrf_token() }}' }
+    }).catch(() => {});
+@endif
+
 async function processApproval(action) {
     const comment = document.getElementById('approval-comment')?.value || '';
 
diff --git a/routes/api.php b/routes/api.php
index e1457946..86157b99 100644
--- a/routes/api.php
+++ b/routes/api.php
@@ -960,6 +960,8 @@
     Route::get('/forms', [\App\Http\Controllers\Api\Admin\ApprovalApiController::class, 'forms'])->name('forms');
     Route::get('/expense-history', [\App\Http\Controllers\Api\Admin\ApprovalApiController::class, 'expenseHistory'])->name('expense-history');
     Route::get('/badge-counts', [\App\Http\Controllers\Api\Admin\ApprovalApiController::class, 'badgeCounts'])->name('badge-counts');
+    Route::post('/mark-completed-read', [\App\Http\Controllers\Api\Admin\ApprovalApiController::class, 'markCompletedAsRead'])->name('mark-completed-read');
+    Route::post('/{id}/mark-read-single', [\App\Http\Controllers\Api\Admin\ApprovalApiController::class, 'markReadSingle'])->name('mark-read-single');
     Route::post('/upload-file', [\App\Http\Controllers\Api\Admin\ApprovalApiController::class, 'uploadFile'])->name('upload-file');
     Route::delete('/files/{fileId}', [\App\Http\Controllers\Api\Admin\ApprovalApiController::class, 'deleteFile'])->name('delete-file');
     Route::get('/files/{fileId}/download', [\App\Http\Controllers\Api\Admin\ApprovalApiController::class, 'downloadFile'])->name('download-file');