diff --git a/B09_Estimation/B09_Estimation_UI_Page.css b/B09_Estimation/B09_Estimation_UI_Page.css
index 67219f9e2..b360866a2 100644
--- a/B09_Estimation/B09_Estimation_UI_Page.css
+++ b/B09_Estimation/B09_Estimation_UI_Page.css
@@ -44,6 +44,12 @@
   gap: var(--spacing-8);
 }
 
+/* 185-2 보기 단추 글 한 줄 */
+.b09-estimation__bar .ui-btn {
+  flex: none;
+  white-space: nowrap;
+}
+
 /* 182 설계내역서 레벨 — 글자 크기(줄 높이 28px 고정 → 16px 까지) · 첫 칸 들여쓰기 1em × (레벨 − 1) */
 .b09-estimation .ui-data-table__table tbody tr.is-lv1 td {
   font-size: var(--text-body);
diff --git a/B09_Estimation/B09_Estimation_UI_Tabs_Groups.ts b/B09_Estimation/B09_Estimation_UI_Tabs_Groups.ts
index 8b523847e..0bc6e9f87 100644
--- a/B09_Estimation/B09_Estimation_UI_Tabs_Groups.ts
+++ b/B09_Estimation/B09_Estimation_UI_Tabs_Groups.ts
@@ -177,7 +177,7 @@ function numberFormat(spec: TabTable, key: string): (v: number | null | undefine
 /** 이 화면 안 보기(기억이 안 돼도 바꾼 보기 유지) */
 const chosen = new Map<TabId, GroupView>();
 
-/** 묶음 탭 — 머리(안내 + 보기 단추) · 고른 보기(카드 · 표) */
+/** 묶음 탭 — 카드 = 안내 + 카드 판(보기 단추는 가로 열 수 줄) · 표 = 머리(안내 + 보기 단추) + 표 */
 export function renderGroupPanel(o: {
   tab: TabId;
   spec: TabTable;
@@ -199,9 +199,6 @@ export function renderGroupPanel(o: {
     },
   });
   toggle.dataset.b09GroupView = view;
-  const bar = document.createElement("div");
-  bar.className = "b09-estimation__bar";
-  bar.append(...(o.hint ? [o.hint] : []), toggle);
   const at = o.focus === undefined ? -1 : rowIndex(o.spec.rows, o.focus);
   if (view === "cards") {
     const first = o.spec.columns[0]?.key ?? "";
@@ -213,10 +210,14 @@ export function renderGroupPanel(o: {
       focus: at,
       money: numberFormat(o.spec, "sum"),
       qty: numberFormat(o.spec, "qty"),
+      actions: [toggle], // 185-2 가로 열 수 단추와 한 줄
     });
     cards.dataset.b09Table = o.tab;
-    return [bar, cards];
+    return [...(o.hint ? [o.hint] : []), cards];
   }
+  const bar = document.createElement("div");
+  bar.className = "b09-estimation__bar";
+  bar.append(...(o.hint ? [o.hint] : []), toggle);
   const range = pickRange(o.spec.rows, o.focus);
   const table = o.makeTable((i) => pickClass(range, i));
   if (at >= 0) requestAnimationFrame(() => table.focusRow(at));
diff --git a/resources/tester/test_171_3_b09_group_tabs.py b/resources/tester/test_171_3_b09_group_tabs.py
index cd5dd8e83..aaee869e7 100644
--- a/resources/tester/test_171_3_b09_group_tabs.py
+++ b/resources/tester/test_171_3_b09_group_tabs.py
@@ -146,13 +146,14 @@ def test_화면_보기_바꿈_누름_이동():
         "\nconst o = { tab: 'dg', spec, hint: null, focus: 'DG1|1', goto: (l) => gone.push(l),"
         " redraw: () => redraws++, makeTable: () => ({ root: document.createElement('table'),"
         " focusRow: (i) => focused.push(i) }) };"
-        "\nconst [bar, view] = renderGroupPanel(o);"
-        "\nconst label = bar.children[0].textContent;"
+        "\nconst [view] = renderGroupPanel(o);"
+        "\nconst btn = view.querySelector('[data-b09-group-view]');"
+        "\nconst label = btn.textContent;"
         "\nview.querySelector('[data-at=\"2\"]').click();"
         "\nview.querySelector('[data-at=\"0\"]').click();"
         "\nconst lit = view.querySelector('[data-at=\"3\"]').classList.contains('is-focus');"
         "\nconst box = view.querySelector('.ui-group-card').classList.contains('is-pick');"
-        "\nbar.children[0].click();"
+        "\nbtn.click();"
         "\nconst [bar2, view2] = renderGroupPanel(o);"
         "\nconsole.log(JSON.stringify({ label, table: view.dataset.b09Table, gone, lit, box, redraws,"
         " label2: bar2.children[0].textContent, tag2: view2.tagName, focused,"
diff --git a/resources/tester/test_185_2_b09_view_bar.py b/resources/tester/test_185_2_b09_view_bar.py
new file mode 100644
index 000000000..7ddc65174
--- /dev/null
+++ b/resources/tester/test_185_2_b09_view_bar.py
@@ -0,0 +1,76 @@
+"""185-2 B09 묶음 탭 도구 줄 — 보기 바꿈 단추 글 한 줄 · 가로 열 수 단추와 같은 줄.
+
+- 카드 보기 = 보기 바꿈 단추가 가로 열 수 줄(`ui-group-cards__bar`) 안 · 표 보기 = 머리 줄(`b09-estimation__bar`)
+- 단추 · 라벨 = `white-space: nowrap` · 도구 줄 = 줄바꿈 없음(`flex-wrap: nowrap`)
+"""
+
+import json
+import re
+import sys
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[2]
+if str(ROOT) not in sys.path:
+    sys.path.insert(0, str(ROOT))
+
+from resources.tester.helper_b09_group_cards import COMMON, GROUPS, RAW, TABS, run  # noqa: E402
+
+B09 = "B09_Estimation/B09_Estimation_UI_Tabs_"
+DG = {"id": "DG1", "no": 1, "name": "찰쌓기", "unit": "m2", "lines": [], "sum": 0}
+HINT = "(() => { const h = document.createElement('p'); h.className = 'hint'; return h; })()"
+
+
+def _block(css: str, selector: str) -> str:
+    m = re.search(re.escape(selector) + r"\s*\{([^}]*)\}", css)
+    assert m, selector
+    return m.group(1)
+
+
+def _panel(view: str, hint: str):
+    """고른 보기 · 안내 글로 그린 뒤 보기 바꿈 단추가 든 줄 · 그 줄의 열 수 단추."""
+    return run(
+        [COMMON, TABS, f"{B09}Labor.ts", GROUPS],
+        f"\nconst spec = buildDaegaBlocks({{ sheets: {{ daega_blocks: [{json.dumps(DG, ensure_ascii=False)}] }} }});"
+        f"\nchosen.set('dg', '{view}');"
+        f"\nconst o = {{ tab: 'dg', spec, hint: {hint}, goto: () => {{}}, redraw: () => {{}},"
+        " makeTable: () => ({ root: document.createElement('table'), focusRow: () => {} }) };"
+        "\nconst out = renderGroupPanel(o);"
+        "\nconst top = out.find((e) => e.all('[data-b09-group-view]').length || e.dataset.b09GroupView);"
+        "\nconst btn = top.dataset.b09GroupView ? top : top.querySelector('[data-b09-group-view]');"
+        "\nconst bar = btn.closest('.ui-group-cards__bar') ?? btn.closest('.b09-estimation__bar') ?? top;"
+        "\nconsole.log(JSON.stringify({ n: out.length, first: out[0].className, label: btn.textContent,"
+        " bar: bar.className, cols: bar.all('[data-group-cols]').map((b) => b.dataset.groupCols) }));",
+        RAW,
+    )
+
+
+def test_카드_보기_단추가_가로_열수_줄에():
+    out = _panel("cards", "null")
+    assert out["bar"] == "ui-group-cards__bar" and out["label"] == "표로 보기"
+    assert out["cols"] == ["1", "2", "3", "4"]  # 같은 줄에 열 수 단추 넷
+    assert out["n"] == 1  # 안내 글 없으면 카드 판 하나뿐
+
+
+def test_카드_보기_안내_글은_카드_위에_따로():
+    out = _panel("cards", HINT)
+    assert out["n"] == 2 and out["first"] == "hint"
+    assert out["bar"] == "ui-group-cards__bar"
+
+
+def test_표_보기_단추는_머리_줄():
+    out = _panel("table", "null")
+    assert out["bar"] == "b09-estimation__bar" and out["label"] == "박스보기"
+    assert out["cols"] == []  # 표 보기 = 열 수 단추 없음
+
+
+def test_CSS_한_줄_nowrap():
+    cards = (ROOT / "ui_template" / "ui_template_group_cards.css").read_text("utf-8")
+    assert "flex-wrap: nowrap" in _block(cards, ".ui-group-cards__bar")
+    item = _block(
+        cards,
+        ".ui-group-cards__bar .ui-btn,\n.ui-group-cards__label,\n.ui-group-cards__count",
+    )
+    assert "white-space: nowrap" in item and "flex: none" in item
+    page = (ROOT / "B09_Estimation" / "B09_Estimation_UI_Page.css").read_text("utf-8")
+    assert "white-space: nowrap" in _block(page, ".b09-estimation__bar .ui-btn")
+    assert "actions: [toggle]" in (ROOT / GROUPS).read_text("utf-8")
diff --git a/ui_template/ui_template_group_cards.css b/ui_template/ui_template_group_cards.css
index 3fa11762a..58499235f 100644
--- a/ui_template/ui_template_group_cards.css
+++ b/ui_template/ui_template_group_cards.css
@@ -10,11 +10,19 @@
 
 .ui-group-cards__bar {
   display: flex;
-  flex-wrap: wrap;
+  flex-wrap: nowrap;
   align-items: center;
   gap: var(--spacing-8);
 }
 
+/* 185-2 도구 줄 = 한 줄 · 단추 · 글 줄바꿈 없음 */
+.ui-group-cards__bar .ui-btn,
+.ui-group-cards__label,
+.ui-group-cards__count {
+  flex: none;
+  white-space: nowrap;
+}
+
 .ui-group-cards__cols {
   display: inline-flex;
   align-items: center;