diff --git a/M02_MasterTemplete/CostFlow/M02_CF_InputPanel.ts b/M02_MasterTemplete/CostFlow/M02_CF_InputPanel.ts
index 168a14005..bcaed88ba 100644
--- a/M02_MasterTemplete/CostFlow/M02_CF_InputPanel.ts
+++ b/M02_MasterTemplete/CostFlow/M02_CF_InputPanel.ts
@@ -31,6 +31,7 @@ import {
   elementOf,
   machineFields,
   queryOf,
+  reconcileUnit,
   removeElement,
   setKind,
   valueOf,
@@ -143,6 +144,9 @@ export function renderInputPanel(
     host.replaceChildren(el("p", { className: "m02-cfip__muted", text: t("NotInput") }));
     return;
   }
+  // 상자 단위가 고른 요소 · 변수 단위와 다르면(견본 등) 맞춰 다시 그림 — 맞으면 바로 지나감
+  const fixed = reconcileUnit(lg, boxId);
+  if (fixed !== lg) return on.change(fixed);
   const input = box.input ?? { mode: "variable" as const, elements: [], variables: [] };
   const kind: CfGroup | "변수" = input.mode === "variable" ? "변수" : (input.group ?? "인력");
   const body = el("div", { className: "m02-cfip__body" });
diff --git a/M02_MasterTemplete/CostFlow/M02_CF_InputPanel_Build.ts b/M02_MasterTemplete/CostFlow/M02_CF_InputPanel_Build.ts
index ce2f0799b..1e392059b 100644
--- a/M02_MasterTemplete/CostFlow/M02_CF_InputPanel_Build.ts
+++ b/M02_MasterTemplete/CostFlow/M02_CF_InputPanel_Build.ts
@@ -282,3 +282,13 @@ export function removeVariable(lg: CfLogic, id: string, name: string, pills?: Pi
     pills,
   );
 }
+
+/** 상자 단위를 요소 · 변수 단위에 맞춤 — 이미 맞으면 받은 것 그대로(견본처럼 단위가 안 맞게 저장된 상자를 열 때 바로잡음) */
+export function reconcileUnit(lg: CfLogic, id: string): CfLogic {
+  const box = lg.boxes.find((b) => b.id === id);
+  if (!box?.input) return lg;
+  const want = unitOfInput(box.input);
+  return box.unit === want
+    ? lg
+    : { ...lg, boxes: lg.boxes.map((b) => (b.id === id ? { ...b, unit: want } : b)) };
+}
diff --git a/resources/tester/test_m02_cf_inputpanel_build.py b/resources/tester/test_m02_cf_inputpanel_build.py
index 890b0639d..79aa5cb05 100644
--- a/resources/tester/test_m02_cf_inputpanel_build.py
+++ b/resources/tester/test_m02_cf_inputpanel_build.py
@@ -219,3 +219,36 @@ def test_환율_유가전력_알약_이름에_날짜가_안_들어감():
         "값": 1900,
     }
     assert call("elementOf", "유가전력", oil)["name"] == "휘발유 서울"
+
+
+def test_단위가_안_맞게_저장된_상자는_열_때_맞춤():
+    el1, el2 = call("elementOf", "인력", LABOR), call("elementOf", "인력", LABOR2)
+    lg = logic()
+    lg["boxes"][0]["input"] = {
+        "mode": "group",
+        "group": "인력",
+        "elements": [el1, el2],
+        "variables": [],
+    }
+    assert lg["boxes"][0]["unit"] == "-"
+    fixed = run([{"op": "fn", "name": "reconcileUnit", "args": [lg, "b1"]}])[0]
+    assert fixed["boxes"][0]["unit"] == "원/일"
+    again = run([{"op": "fn", "name": "reconcileUnit", "args": [fixed, "b1"]}])[0]
+    assert again == fixed
+    oil = {"ref": "X", "name": "경유", "spec": "", "unit": "원/L"}
+    lg["boxes"][0]["input"]["elements"].append(oil)
+    lg["boxes"][0]["unit"] = "원/일"
+    assert (
+        run([{"op": "fn", "name": "reconcileUnit", "args": [lg, "b1"]}])[0]["boxes"][0]["unit"]
+        == "-"
+    )
+    one = {
+        "mode": "variable",
+        "elements": [],
+        "variables": [{"name": "면적", "type": "number", "unit": "㎡", "example": 1}],
+    }
+    lg["boxes"][0]["input"] = one
+    assert (
+        run([{"op": "fn", "name": "reconcileUnit", "args": [lg, "b1"]}])[0]["boxes"][0]["unit"]
+        == "㎡"
+    )