diff --git a/B09_Estimation/B09_Estimation_UI_Tab_Progress.ts b/B09_Estimation/B09_Estimation_UI_Tab_Progress.ts
index 9fc70bcb..359e6401 100644
--- a/B09_Estimation/B09_Estimation_UI_Tab_Progress.ts
+++ b/B09_Estimation/B09_Estimation_UI_Tab_Progress.ts
@@ -188,6 +188,19 @@ function drawPanel(ctx: B09TabContext, data: ProgressDto, reload: (round: number
       },
     }),
   );
+  if (draft.rounds.length) {
+    box.append(
+      createButton({
+        label: `${draft.rounds.length}회 지우기(저장)`,
+        variant: "ghost",
+        onClick: () => {
+          // 앞 회차를 지우면 뒤 회차의 전회가 통째로 바뀜 — 마지막 회차만 지움.
+          draft.rounds.pop();
+          void save(draft.rounds.length);
+        },
+      }),
+    );
+  }
   const current = draft.rounds[data.round - 1];
   if (current) {
     const vat = el("label");