diff --git a/system1-factory/web/css/my-monthly-confirm.css b/system1-factory/web/css/my-monthly-confirm.css
index 20037c2..f607829 100644
--- a/system1-factory/web/css/my-monthly-confirm.css
+++ b/system1-factory/web/css/my-monthly-confirm.css
@@ -76,8 +76,14 @@ body { max-width: 480px; margin: 0 auto; }
 .cal-cell.special .cal-val { color: #b45309; }
 .cal-cell.partial .cal-val { color: #6b7280; }
 .cal-cell.none .cal-val { color: #d1d5db; }
+.cal-cell.changed { outline: 2px solid #f59e0b; outline-offset: -2px; }
+.cal-cell.changed::after { content: '수정'; position: absolute; top: 1px; right: 2px; font-size: 0.5rem; color: #f59e0b; font-weight: 700; }
+.cal-cell { position: relative; }
 
-/* 상세 표시 */
+/* 상세 표시 + 수정 */
+.cal-edit-row { margin-top: 6px; display: flex; align-items: center; gap: 6px; }
+.cal-edit-select { padding: 4px 8px; border: 1px solid #d1d5db; border-radius: 6px; font-size: 0.8rem; flex: 1; }
+.cal-changed-badge { font-size: 0.65rem; font-weight: 700; color: #f59e0b; background: #fefce8; padding: 1px 6px; border-radius: 4px; }
 .cal-detail { display: none; margin-bottom: 10px; }
 .cal-detail-inner {
   background: white; border-radius: 10px; padding: 10px 14px;
diff --git a/system1-factory/web/js/my-monthly-confirm.js b/system1-factory/web/js/my-monthly-confirm.js
index 0261b9b..0c1c8dc 100644
--- a/system1-factory/web/js/my-monthly-confirm.js
+++ b/system1-factory/web/js/my-monthly-confirm.js
@@ -6,6 +6,9 @@ var DAYS_KR = ['일', '월', '화', '수', '목', '금', '토'];
 var currentYear, currentMonth;
 var isProcessing = false;
 var selectedCell = null;
+var currentConfStatus = null; // 현재 confirmation 상태
+var pendingChanges = {}; // 수정 내역 { 'YYYY-MM-DD': { from: '반차', to: '정시', hours: 8 } }
+var loadedRecords = []; // 로드된 daily_records
 
 // ===== Init =====
 document.addEventListener('DOMContentLoaded', function() {
@@ -61,6 +64,9 @@ async function loadData() {
     renderUserInfo(data.user);
     renderCalendar(data.daily_records || []);
     renderSummaryCards(data.daily_records || []);
+    loadedRecords = data.daily_records || [];
+    currentConfStatus = data.confirmation ? data.confirmation.status : 'pending';
+    pendingChanges = {};
     renderVacationBalance(balanceRes.data || []);
     renderConfirmStatus(data.confirmation);
   } catch (e) {
@@ -146,24 +152,75 @@ function selectDay(day) {
   var cells = document.querySelectorAll('.cal-cell');
   cells.forEach(function(c) { c.classList.remove('selected'); });
 
-  // 해당 셀 찾기
   var allCells = document.querySelectorAll('.cal-cell:not(.empty)');
   if (allCells[day - 1]) allCells[day - 1].classList.add('selected');
 
   var dateStr = currentYear + '-' + String(currentMonth).padStart(2, '0') + '-' + String(day).padStart(2, '0');
   var d = new Date(currentYear, currentMonth - 1, day);
   var dow = DAYS_KR[d.getDay()];
+  var record = loadedRecords.find(function(r) { return parseInt(r.date.substring(8)) === day; });
+  var currentVal = record ? getCellInfo(record).text : '-';
 
-  // 현재 로드된 데이터에서 찾기
-  var calWrap = document.getElementById('tableWrap');
-  var cellEl = allCells[day - 1];
-  if (!cellEl) return;
+  var html = '<div class="cal-detail-inner">';
+  html += '<strong>' + currentMonth + '/' + day + ' (' + dow + ')</strong> — ' + escHtml(currentVal);
 
-  var info = cellEl.querySelector('.cal-val').textContent;
-  el.innerHTML = '<div class="cal-detail-inner">' +
-    '<strong>' + currentMonth + '/' + day + ' (' + dow + ')</strong> — ' + info +
-    '</div>';
+  // review_sent 상태에서만 수정 드롭다운 표시
+  if (currentConfStatus === 'review_sent') {
+    var changed = pendingChanges[dateStr];
+    html += '<div class="cal-edit-row">';
+    html += '<select id="editType-' + day + '" onchange="onCellChange(' + day + ')" class="cal-edit-select">';
+    html += '<option value="">변경 없음</option>';
+    html += '<option value="정시"' + (changed && changed.to === '정시' ? ' selected' : '') + '>정시 (8h)</option>';
+    html += '<option value="연차"' + (changed && changed.to === '연차' ? ' selected' : '') + '>연차 (0h)</option>';
+    html += '<option value="반차"' + (changed && changed.to === '반차' ? ' selected' : '') + '>반차 (4h)</option>';
+    html += '<option value="반반차"' + (changed && changed.to === '반반차' ? ' selected' : '') + '>반반차 (6h)</option>';
+    html += '<option value="조퇴"' + (changed && changed.to === '조퇴' ? ' selected' : '') + '>조퇴 (2h)</option>';
+    html += '<option value="휴무"' + (changed && changed.to === '휴무' ? ' selected' : '') + '>휴무 (0h)</option>';
+    html += '</select>';
+    if (changed) html += ' <span class="cal-changed-badge">수정</span>';
+    html += '</div>';
+  }
+
+  html += '</div>';
+  el.innerHTML = html;
   el.style.display = 'block';
+  updateChangeRequestBtn();
+}
+
+function onCellChange(day) {
+  var dateStr = currentYear + '-' + String(currentMonth).padStart(2, '0') + '-' + String(day).padStart(2, '0');
+  var sel = document.getElementById('editType-' + day);
+  var newType = sel ? sel.value : '';
+  var record = loadedRecords.find(function(r) { return parseInt(r.date.substring(8)) === day; });
+  var currentType = record ? getCellInfo(record).text : '-';
+
+  if (newType && newType !== currentType) {
+    var hoursMap = { '정시': 8, '연차': 0, '반차': 4, '반반차': 6, '조퇴': 2, '휴무': 0 };
+    pendingChanges[dateStr] = { from: currentType, to: newType, hours: hoursMap[newType] || 0 };
+    // 셀에 수정 뱃지
+    var allCells = document.querySelectorAll('.cal-cell:not(.empty)');
+    if (allCells[day - 1]) allCells[day - 1].classList.add('changed');
+  } else {
+    delete pendingChanges[dateStr];
+    var allCells2 = document.querySelectorAll('.cal-cell:not(.empty)');
+    if (allCells2[day - 1]) allCells2[day - 1].classList.remove('changed');
+  }
+  updateChangeRequestBtn();
+  // 상세 영역 재렌더
+  selectDay(day);
+}
+
+function updateChangeRequestBtn() {
+  var rejectBtn = document.getElementById('rejectBtn');
+  if (!rejectBtn) return;
+  var changeCount = Object.keys(pendingChanges).length;
+  if (currentConfStatus === 'review_sent' && changeCount > 0) {
+    rejectBtn.disabled = false;
+    rejectBtn.innerHTML = '<i class="fas fa-edit mr-2"></i>수정요청 (' + changeCount + '건)';
+  } else if (currentConfStatus === 'review_sent') {
+    rejectBtn.disabled = true;
+    rejectBtn.innerHTML = '<i class="fas fa-edit mr-2"></i>수정요청';
+  }
 }
 
 function renderSummaryCards(records) {
@@ -239,7 +296,8 @@ function renderConfirmStatus(conf) {
     actions.classList.remove('hidden');
     confirmBtn.innerHTML = '<i class="fas fa-check-circle mr-2"></i>확인 완료';
     rejectBtn.innerHTML = '<i class="fas fa-edit mr-2"></i>수정요청';
-    rejectBtn.onclick = function() { openChangeRequestModal(); };
+    rejectBtn.disabled = true; // 수정 내역 없으면 비활성화
+    rejectBtn.onclick = function() { submitChangeRequest(); };
   } else if (status === 'confirmed') {
     badge.textContent = '확인완료';
     badge.className = 'mmc-status-badge confirmed';
@@ -291,6 +349,26 @@ async function confirmMonth() {
   finally { isProcessing = false; }
 }
 
+async function submitChangeRequest() {
+  if (isProcessing) return;
+  var changeCount = Object.keys(pendingChanges).length;
+  if (changeCount === 0) { showToast('수정 내역이 없습니다', 'error'); return; }
+  if (!confirm(changeCount + '건의 수정요청을 제출하시겠습니까?')) return;
+  isProcessing = true;
+  try {
+    var changes = Object.keys(pendingChanges).map(function(date) {
+      return { date: date, from: pendingChanges[date].from, to: pendingChanges[date].to };
+    });
+    var res = await window.apiCall('/monthly-comparison/confirm', 'POST', {
+      year: currentYear, month: currentMonth, status: 'change_request',
+      change_details: { changes: changes }
+    });
+    if (res && res.success) { showToast(res.message || '수정요청 완료', 'success'); loadData(); }
+    else { showToast(res && res.message || '처리 실패', 'error'); }
+  } catch (e) { showToast('네트워크 오류', 'error'); }
+  finally { isProcessing = false; }
+}
+
 function openRejectModal() {
   document.getElementById('rejectReason').value = '';
   document.getElementById('rejectModal').classList.remove('hidden');
diff --git a/system1-factory/web/pages/attendance/my-monthly-confirm.html b/system1-factory/web/pages/attendance/my-monthly-confirm.html
index 3f2ab71..a65a9ab 100644
--- a/system1-factory/web/pages/attendance/my-monthly-confirm.html
+++ b/system1-factory/web/pages/attendance/my-monthly-confirm.html
@@ -8,7 +8,7 @@
     <script>tailwind.config = { corePlugins: { preflight: false } }</script>
     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
     <link rel="stylesheet" href="/static/css/tkfb.css?v=2026033108">
-    <link rel="stylesheet" href="/css/my-monthly-confirm.css?v=2026040104">
+    <link rel="stylesheet" href="/css/my-monthly-confirm.css?v=2026040105">
 </head>
 <body class="bg-gray-50">
     <header class="bg-orange-700 text-white sticky top-0 z-50">
@@ -106,7 +106,7 @@
 
     <script src="/static/js/tkfb-core.js?v=2026033108"></script>
     <script src="/js/api-base.js?v=2026031701"></script>
-    <script src="/js/my-monthly-confirm.js?v=2026040104"></script>
+    <script src="/js/my-monthly-confirm.js?v=2026040105"></script>
     <script>initAuth();</script>
 </body>
 </html>