diff --git a/B08_Quantity/B08_Quantity_Summary_Data.ts b/B08_Quantity/B08_Quantity_Summary_Data.ts
index ec4800b5c..3784dd949 100644
--- a/B08_Quantity/B08_Quantity_Summary_Data.ts
+++ b/B08_Quantity/B08_Quantity_Summary_Data.ts
@@ -58,6 +58,17 @@ export function linkedOnly<T extends PlacedItem>(
   return out;
 }
 
+/** 관 지점 구조물 id — 서버가 낸 id(사본 · 시설 · `pipe@{측점 셋째 자리}`) 가운데 같은 측점(±6mm)의 것 ·
+ * 없으면 null. 관 지점 응답 측점은 둘째 자리라(B04 `round(…, 2)`) 셋째 자리 id 와 어긋남(167-1). */
+export function pipeOwnerId(chainage: number, ids: Iterable<string>): string | null {
+  for (const id of ids) {
+    const owner = id.split(GROUP_JOIN)[0];
+    const at = Number(owner.slice("pipe@".length));
+    if (owner.startsWith("pipe@") && Math.abs(at - chainage) <= 0.006) return owner;
+  }
+  return null;
+}
+
 /** 미연결 시설 한 칸(서버 `unlinked_facilities` · 154) — 본체 `group` = null. */
 export interface UnlinkedSlot {
   /** 사본 id(본체 = 시설 id · 그룹 = `{id}__{그룹}`) */
diff --git a/B08_Quantity/B08_Quantity_UI_Summary.ts b/B08_Quantity/B08_Quantity_UI_Summary.ts
index daf25240b..5a25baa8f 100644
--- a/B08_Quantity/B08_Quantity_UI_Summary.ts
+++ b/B08_Quantity/B08_Quantity_UI_Summary.ts
@@ -31,6 +31,7 @@ import {
   combosAt,
   comboId,
   linkedOnly,
+  pipeOwnerId,
   summaryColumns,
   summaryStations,
   type ComboColumn,
@@ -235,8 +236,13 @@ export async function renderStructureSummary(host: HTMLElement, projectId: strin
       return group ? { group, name: rest.join(" ") || group } : null;
     };
     const comboPath = (id: string): string | null => paths.get(id)?.join(" ") || null;
+    // 관 지점 id = 서버가 낸 id 먼저(응답 측점은 둘째 자리 · id 는 셋째 자리 · 167-1)
+    const ids = [...Object.keys(linked), ...(saved?.facilities ?? []).map((f) => f.id)];
     const placed = linkedOnly(
-      pipes.map((point) => ({ ...point, structure_id: pipeStructureId(point.chainage_m) })),
+      pipes.map((point) => ({
+        ...point,
+        structure_id: pipeOwnerId(point.chainage_m, ids) ?? pipeStructureId(point.chainage_m),
+      })),
       linked,
     );
     const mine = linkedOnly(structures.structures, linked);
diff --git a/resources/tester/test_167_1_b08_pipe_owner_id.py b/resources/tester/test_167_1_b08_pipe_owner_id.py
new file mode 100644
index 000000000..f56bf9186
--- /dev/null
+++ b/resources/tester/test_167_1_b08_pipe_owner_id.py
@@ -0,0 +1,56 @@
+# -*- coding: utf-8 -*-
+"""167-1 B08 구조물도 모달 — 일부 칸만 연결된 관 지점도 조합 카드가 뜸.
+
+까닭 = 관 지점 응답 측점은 소수 둘째 자리(B04 `round(…, 2)` · 80.17) · 사본 id 는 셋째 자리
+(`pipe@80.167`) → 화면이 만든 id 가 사본과 어긋나 `linkedOnly` 가 빼고 `combosAt` 이 빈 배열.
+고침 = 서버가 낸 id(사본 · 시설) 가운데 같은 측점(±6mm)의 것을 씀(`pipeOwnerId`).
+`B08_Quantity_Summary_Data.ts` 를 node 로 돌림(61-1 시험과 같은 꼴).
+"""
+
+import json
+from pathlib import Path
+
+from test_61_1_b08_summary_table import _item, _run
+
+ROOT = Path(__file__).resolve().parents[2]
+
+# 검증_랩탑메인 재현 꼴 — 배관 네 칸 가운데 본체만 연결
+LINKED = {
+    "pipe@80.167": {
+        "항목": _item("SS55"),
+        "폴더": "pipe@80.167",
+        "부분": ["도면"],
+        "경로": ["기슭막이"],
+    }
+}
+FACILITY_IDS = ["pipe@80.167", "pipe@173.09", "st1"]
+POINT = {"chainage_m": 80.17, "summary_item": _item("SS55")}  # 응답 = 둘째 자리
+
+
+def test_서버_id_를_씀():
+    out = _run(
+        f"\nconst ids = {json.dumps(list(LINKED) + FACILITY_IDS)};"
+        "\nconsole.log(JSON.stringify({"
+        " a: pipeOwnerId(80.17, ids), b: pipeOwnerId(173.09, ['pipe@173.09__gford']),"
+        " c: pipeOwnerId(258.12, ids), d: pipeOwnerId(80.16, ['st1', 'pipe@80.165']) }));"
+    )
+    assert out == {"a": "pipe@80.167", "b": "pipe@173.09", "c": None, "d": "pipe@80.165"}
+
+
+def test_한_칸만_연결_때_조합_하나():
+    out = _run(
+        f"\nconst linked = {json.dumps(LINKED, ensure_ascii=False)};"
+        f"\nconst p = {json.dumps(POINT, ensure_ascii=False)};"
+        "\nconst old = linkedOnly([{ ...p, structure_id: 'pipe@80.17' }], linked);"
+        "\nconst got = linkedOnly([{ ...p, structure_id: pipeOwnerId(p.chainage_m, Object.keys(linked)) }], linked);"
+        "\nconsole.log(JSON.stringify({ old: combosAt(old, 80.167).length, got: combosAt(got, 80.167) }));"
+    )
+    assert out["old"] == 0  # 고치기 전 = 카드 없음
+    assert len(out["got"]) == 1
+    assert out["got"][0]["copyId"] == "pipe@80.167" and out["got"][0]["id"] == "system||SS55"
+
+
+def test_화면_연결():
+    summary = (ROOT / "B08_Quantity/B08_Quantity_UI_Summary.ts").read_text(encoding="utf-8")
+    assert "...(saved?.facilities ?? []).map((f) => f.id)" in summary
+    assert "pipeOwnerId(point.chainage_m, ids) ?? pipeStructureId(point.chainage_m)" in summary