diff --git a/app/modules/cupang/db.py b/app/modules/cupang/db.py
index 33ea977..39da6f7 100644
--- a/app/modules/cupang/db.py
+++ b/app/modules/cupang/db.py
@@ -338,6 +338,73 @@ class CupangDBStore:
             if cur.rowcount == 0:
                 raise KeyError(product_id)
 
+    def update_product(
+        self,
+        *,
+        product_id: int,
+        product_name: str,
+        product_code: str,
+        coupang_item_code: str = "",
+    ) -> dict[str, Any]:
+        """등록된 제품 수정(제품명/제품코드/쿠팡상품코드).
+
+        제품코드가 바뀌면 같은 코드로 연결돼 있던 박스 규칙(cupang_box_rules)의
+        product_code 도 함께 옮긴다(출고 라인은 과거 기록이라 스냅샷 유지).
+        """
+        name = (product_name or "").strip()
+        code = (product_code or "").strip()
+        cic = (coupang_item_code or "").strip()
+        if not name or not code:
+            raise ValueError("제품코드와 제품명 모두 필요합니다.")
+        with self._pool.connection() as conn:
+            with conn.transaction():
+                old = conn.execute(
+                    "SELECT * FROM cupang_products WHERE id = %s FOR UPDATE",
+                    (product_id,),
+                ).fetchone()
+                if old is None:
+                    raise KeyError(product_id)
+                old_code = (old["product_code"] or "").strip()
+                if code != old_code:
+                    dup = conn.execute(
+                        "SELECT 1 FROM cupang_products "
+                        "WHERE product_code = %s AND id <> %s",
+                        (code, product_id),
+                    ).fetchone()
+                    if dup:
+                        raise ValueError(f"제품코드 {code} 는 이미 등록돼 있습니다.")
+                row = conn.execute(
+                    """
+                    UPDATE cupang_products
+                       SET product_name      = %s,
+                           product_code      = %s,
+                           coupang_item_code = %s
+                     WHERE id = %s
+                    RETURNING *
+                    """,
+                    (name, code, cic, product_id),
+                ).fetchone()
+                if code != old_code:
+                    # 새 코드로 된 규칙이 이미 있으면 옮기지 않는다(중복 방지).
+                    exists_new = conn.execute(
+                        "SELECT 1 FROM cupang_box_rules WHERE product_code = %s",
+                        (code,),
+                    ).fetchone()
+                    if not exists_new:
+                        conn.execute(
+                            "UPDATE cupang_box_rules "
+                            "SET product_code = %s, product_name_snapshot = %s "
+                            "WHERE product_code = %s",
+                            (code, name, old_code),
+                        )
+                else:
+                    conn.execute(
+                        "UPDATE cupang_box_rules SET product_name_snapshot = %s "
+                        "WHERE product_code = %s",
+                        (name, code),
+                    )
+        return self._product_serialize(row)
+
     def toggle_product_active(self, *, product_id: int) -> dict[str, Any]:
         """활성 ↔ 비활성 뒤집기. 갱신된 행을 반환."""
         with self._pool.connection() as conn:
diff --git a/app/modules/cupang/router.py b/app/modules/cupang/router.py
index 84c6dae..a340a6b 100644
--- a/app/modules/cupang/router.py
+++ b/app/modules/cupang/router.py
@@ -917,6 +917,31 @@ async def product_set_active(
     return RedirectResponse(url="/cupang/products", status_code=303)
 
 
+@router.post("/api/products/{product_id:int}/edit")
+async def product_edit(
+    request: Request,
+    product_id: int,
+    payload: dict[str, Any] = Body(...),
+    user: dict[str, Any] = Depends(_require_user),
+) -> JSONResponse:
+    """등록된 제품 수정. body: {product_name, product_code, coupang_item_code}."""
+    store = _store(request)
+    if store is None:
+        raise HTTPException(status_code=503, detail="cupang_db 미설정")
+    try:
+        product = store.update_product(
+            product_id=product_id,
+            product_name=str(payload.get("product_name") or ""),
+            product_code=str(payload.get("product_code") or ""),
+            coupang_item_code=str(payload.get("coupang_item_code") or ""),
+        )
+    except KeyError:
+        raise HTTPException(status_code=404, detail="제품을 찾을 수 없습니다.")
+    except ValueError as exc:
+        raise HTTPException(status_code=400, detail=str(exc))
+    return JSONResponse({"ok": True, "product": product})
+
+
 @router.post("/api/products/{product_id:int}/toggle")
 async def product_toggle_active(
     request: Request,
diff --git a/app/modules/cupang/templates/cupang/products.html b/app/modules/cupang/templates/cupang/products.html
index 259caa2..1ae9c19 100644
--- a/app/modules/cupang/templates/cupang/products.html
+++ b/app/modules/cupang/templates/cupang/products.html
@@ -81,6 +81,8 @@
               </td>
               <td>
                 <div class="cpg-row-actions">
+                  <button type="button" class="erp-btn erp-btn-outline cpg-prod-edit"
+                          data-edit-id="{{ p.id }}">수정</button>
                   <form method="post" action="/cupang/products/{{ p.id }}/delete" class="cpg-inline-form"
                         onsubmit="return confirm('완전 삭제합니다. 계속할까요?');">
                     <button type="submit" class="erp-btn erp-btn-danger">삭제</button>
@@ -137,6 +139,90 @@
 })();
 </script>
 
+<!-- 등록된 제품 수정 팝업 -->
+<div class="cpg-modal" id="cpg-edit-dlg" hidden>
+  <div class="cpg-modal-back" data-edit-close></div>
+  <div class="cpg-modal-box" role="dialog" aria-modal="true" aria-labelledby="cpg-edit-title">
+    <h3 id="cpg-edit-title">제품 수정</h3>
+    <label class="erp-field"><span>제품명 *</span>
+      <input class="erp-input" type="text" id="cpg-edit-name" /></label>
+    <label class="erp-field"><span>제품코드 *</span>
+      <input class="erp-input" type="text" id="cpg-edit-code" /></label>
+    <label class="erp-field"><span>쿠팡상품코드</span>
+      <input class="erp-input" type="text" id="cpg-edit-cpcode" placeholder="비우면 지워집니다" /></label>
+    <p class="erp-muted" id="cpg-edit-msg" style="margin:0;font-size:12px;"></p>
+    <div class="cpg-dlg-actions erp-page-actions">
+      <button type="button" class="erp-btn erp-btn-outline" data-edit-close>취소</button>
+      <button type="button" class="erp-btn erp-btn-primary" id="cpg-edit-save">저장</button>
+    </div>
+  </div>
+</div>
+
+<script>
+// 등록된 제품 수정 — [수정] 클릭 → 팝업에서 제품명/제품코드/쿠팡상품코드 변경.
+(function () {
+  var tbody = document.getElementById("cpg-prod-tbody");
+  var dlg = document.getElementById("cpg-edit-dlg");
+  if (!tbody || !dlg) return;
+  var elName = document.getElementById("cpg-edit-name");
+  var elCode = document.getElementById("cpg-edit-code");
+  var elCp = document.getElementById("cpg-edit-cpcode");
+  var elMsg = document.getElementById("cpg-edit-msg");
+  var saveBtn = document.getElementById("cpg-edit-save");
+  var editingId = null;
+
+  function close() { dlg.hidden = true; editingId = null; saveBtn.disabled = false; }
+
+  tbody.addEventListener("click", function (e) {
+    var btn = e.target.closest(".cpg-prod-edit");
+    if (!btn) return;
+    var row = btn.closest("tr");
+    editingId = btn.getAttribute("data-edit-id");
+    elName.value = row.getAttribute("data-name") || "";
+    elCode.value = row.getAttribute("data-code") || "";
+    elCp.value = row.getAttribute("data-cpcode") || "";
+    elMsg.textContent = "";
+    dlg.hidden = false;
+    elName.focus();
+  });
+
+  Array.prototype.forEach.call(dlg.querySelectorAll("[data-edit-close]"), function (el) {
+    el.addEventListener("click", close);
+  });
+  document.addEventListener("keydown", function (e) {
+    if (e.key === "Escape" && !dlg.hidden) close();
+  });
+
+  saveBtn.addEventListener("click", function () {
+    if (!editingId) return;
+    var body = {
+      product_name: (elName.value || "").trim(),
+      product_code: (elCode.value || "").trim(),
+      coupang_item_code: (elCp.value || "").trim()
+    };
+    if (!body.product_name || !body.product_code) {
+      elMsg.textContent = "제품명과 제품코드는 필수입니다."; return;
+    }
+    saveBtn.disabled = true;
+    elMsg.textContent = "저장 중…";
+    fetch("/cupang/api/products/" + editingId + "/edit", {
+      method: "POST",
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify(body)
+    }).then(function (r) {
+      return r.json().then(function (d) {
+        if (!r.ok) throw new Error((d && d.detail) || "저장 실패");
+        return d;
+      });
+    }).then(function () { location.reload(); })
+      .catch(function (err) {
+        saveBtn.disabled = false;
+        elMsg.textContent = err.message || "저장 실패";
+      });
+  });
+})();
+</script>
+
 <script>
 // 상태 배지 클릭 → 활성/비활성 토글 (페이지 새로고침 없음).
 (function () {