diff --git a/frontend/src/components/MailView.tsx b/frontend/src/components/MailView.tsx
new file mode 100644
index 00000000..4df2182f
--- /dev/null
+++ b/frontend/src/components/MailView.tsx
@@ -0,0 +1,91 @@
+import DOMPurify from 'dompurify'
+import { useMailStore } from '../store/mailStore'
+import { mailApi } from '../api/mailApi'
+
+export default function MailView() {
+  const { selectedMail, currentFolder, openCompose } = useMailStore()
+
+  if (!selectedMail) return (
+    <div className="mail-view-empty">
+      <div className="empty-icon">✉️</div>
+      <div>메일을 선택하세요</div>
+    </div>
+  )
+
+  const m = selectedMail
+  const cleanHtml = m.body_html
+    ? DOMPurify.sanitize(m.body_html, { FORBID_TAGS: ['script', 'iframe', 'object'] })
+    : null
+
+  const reply = () => openCompose(m)
+  const forward = () => openCompose({ ...m, subject: `Fw: ${m.subject}`, to: '', uid: '' } as any)
+
+  return (
+    <div className="mail-view">
+      <div className="mail-view-header">
+        <h2 className="mail-subject">{m.subject}</h2>
+        <div className="mail-meta">
+          <div className="mail-from">
+            <span className="meta-label">보낸사람</span>
+            <span>{m.sender} &lt;{m.sender_addr}&gt;</span>
+          </div>
+          <div className="mail-to">
+            <span className="meta-label">받는사람</span>
+            <span>{m.to}</span>
+          </div>
+          {m.cc && (
+            <div className="mail-cc">
+              <span className="meta-label">참조</span>
+              <span>{m.cc}</span>
+            </div>
+          )}
+          <div className="mail-date-row">
+            <span className="meta-label">날짜</span>
+            <span>{m.date}</span>
+          </div>
+        </div>
+        <div className="mail-actions">
+          <button className="btn-reply" onClick={reply}>↩️ 답장</button>
+          <button className="btn-forward" onClick={forward}>↪️ 전달</button>
+        </div>
+      </div>
+
+      {/* 첨부파일 */}
+      {m.attachments?.length > 0 && (
+        <div className="mail-attachments">
+          <div className="attach-title">📎 첨부파일 ({m.attachments.length}개)</div>
+          <div className="attach-list">
+            {m.attachments.map(a => (
+              <a
+                key={a.part_id}
+                href={mailApi.attachmentUrl(m.uid, a.part_id, currentFolder)}
+                className="attach-item" download={a.filename}
+              >
+                <span className="attach-name">{a.filename}</span>
+                <span className="attach-size">({fmtSize(a.size)})</span>
+              </a>
+            ))}
+          </div>
+        </div>
+      )}
+
+      {/* 본문 */}
+      <div className="mail-body-content">
+        {cleanHtml ? (
+          <div
+            className="mail-html-body"
+            dangerouslySetInnerHTML={{ __html: cleanHtml }}
+          />
+        ) : (
+          <pre className="mail-text-body">{m.body_text}</pre>
+        )}
+      </div>
+    </div>
+  )
+}
+
+function fmtSize(b: number) {
+  if (b < 1024) return `${b}B`
+  if (b < 1024 * 1024) return `${(b / 1024).toFixed(0)}KB`
+  return `${(b / 1024 / 1024).toFixed(1)}MB`
+}