diff --git a/B05_Profile/B05_Profile_UI_Viewer.ts b/B05_Profile/B05_Profile_UI_Viewer.ts
index 9c67a27c..51cd5ea1 100644
--- a/B05_Profile/B05_Profile_UI_Viewer.ts
+++ b/B05_Profile/B05_Profile_UI_Viewer.ts
@@ -11,10 +11,10 @@ import {
   sceneToModel,
   type ModelBounds,
   type RouteMarkers,
-  type RoutePointKind,
   type SectionStationMarker,
 } from "./B05_Profile_UI_Markers";
 import { createOrthoCameraRig } from "./B05_Profile_UI_Viewer_Camera";
+import { bindMarkerPointerControls } from "./B05_Profile_UI_Viewer_Marker_Input";
 import type { CorridorBuildResult } from "./B05_Profile_UI_Corridor_Build";
 import {
   createCorridorGroup,
@@ -184,10 +184,6 @@ export function createRouteViewer(): RouteViewer {
   let bounds: ModelBounds | null = null;
   let current: { projectId: string; modelId: number; smooth: boolean; interval: number } | null =
     null;
-  let movingSelected = false;
-  let dragCandidate: { id: string; pointerId: number; x: number; y: number } | null = null;
-  let draggingMarker = false;
-  let lastDragPoint: { x: number; y: number; z: number } | null = null;
   /**
    * 모델 좌표 (x, y) 자리의 지형 표고. 지형 위에서 수직으로 광선을 쏴 맞은 높이를 돌려준다.
    * 계획노선 CSV로 만든 점처럼 표고가 없는 자리를 지형에 얹을 때 쓴다.
@@ -218,6 +214,15 @@ export function createRouteViewer(): RouteViewer {
     },
   };
   const markers = createRouteMarkers(scene, () => bounds, terrainElevation);
+  // 캔버스 포인터 입력(마커 끌기·고르기·끌어놓기)은 따로 뗐다(2026-09-02, 700줄 제한).
+  const markerInput = bindMarkerPointerControls({
+    canvas,
+    camera,
+    controls,
+    markers,
+    getTerrain: () => terrain,
+    getBounds: () => bounds,
+  });
   // 회전·줌 중심을 커서 아래 지형 지점으로 (B04 뷰어들과 공용 유틸).
   // 마커를 잡고 있는 동안에는 회전을 넘겨 드래그 이동이 우선하게 한다.
   const releaseCursorPivot = bindCursorPivotControls({
@@ -225,7 +230,7 @@ export function createRouteViewer(): RouteViewer {
     controls,
     element: canvas,
     pickables: () => (terrain ? [terrain] : []),
-    blocked: () => dragCandidate !== null || draggingMarker || movingSelected,
+    blocked: () => markerInput.blocked(),
     scene,
   });
 
@@ -310,132 +315,6 @@ export function createRouteViewer(): RouteViewer {
   }
 
   /** 화면(client) 좌표 아래 지형의 모델 좌표 — 우클릭 구조물 배치 등 외부 픽에도 쓴다. */
-  function terrainPointAt(
-    clientX: number,
-    clientY: number,
-  ): { x: number; y: number; z: number } | null {
-    if (!terrain || !bounds) return null;
-    const rect = canvas.getBoundingClientRect();
-    const pointer = new THREE.Vector2(
-      ((clientX - rect.left) / rect.width) * 2 - 1,
-      -((clientY - rect.top) / rect.height) * 2 + 1,
-    );
-    const raycaster = new THREE.Raycaster();
-    raycaster.setFromCamera(pointer, camera);
-    const hit = raycaster.intersectObject(terrain, true)[0];
-    return hit ? sceneToModel(hit.point, bounds) : null;
-  }
-
-  function terrainPoint(
-    event: PointerEvent | DragEvent,
-  ): { x: number; y: number; z: number } | null {
-    return terrainPointAt(event.clientX, event.clientY);
-  }
-
-  canvas.addEventListener("dragover", (event) => event.preventDefault());
-  canvas.addEventListener("drop", (event) => {
-    event.preventDefault();
-    const kind = event.dataTransfer?.getData("pointType") as RoutePointKind;
-    const point = terrainPoint(event);
-    if (point && ["bp", "ep", "cp", "ap", "fp"].includes(kind)) markers.place(kind, point);
-  });
-  function markerHit(event: PointerEvent): THREE.Object3D | undefined {
-    const rect = canvas.getBoundingClientRect();
-    const pointer = new THREE.Vector2(
-      ((event.clientX - rect.left) / rect.width) * 2 - 1,
-      -((event.clientY - rect.top) / rect.height) * 2 + 1,
-    );
-    const raycaster = new THREE.Raycaster();
-    raycaster.setFromCamera(pointer, camera);
-    return raycaster.intersectObject(markers.group, true)[0]?.object;
-  }
-
-  function finishMarkerInteraction(selectCandidate: boolean): void {
-    if (dragCandidate && (draggingMarker || selectCandidate)) {
-      markers.selectPoint(dragCandidate.id);
-    }
-    if (dragCandidate && canvas.hasPointerCapture(dragCandidate.pointerId)) {
-      canvas.releasePointerCapture(dragCandidate.pointerId);
-    }
-    controls.enabled = true;
-    dragCandidate = null;
-    draggingMarker = false;
-    lastDragPoint = null;
-  }
-
-  function handlePointerDown(event: PointerEvent): void {
-    if (event.button !== 0) return;
-    const hit = markerHit(event);
-    const pointId = markers.pointIdForObject(hit);
-    if (pointId) {
-      dragCandidate = {
-        id: pointId,
-        pointerId: event.pointerId,
-        x: event.clientX,
-        y: event.clientY,
-      };
-      draggingMarker = false;
-      lastDragPoint = null;
-      canvas.setPointerCapture(event.pointerId);
-      event.preventDefault();
-      event.stopPropagation();
-      return;
-    }
-    if (hit) {
-      markers.selectObject(hit);
-      event.stopPropagation();
-      return;
-    }
-    if (movingSelected) {
-      const point = terrainPoint(event);
-      if (point) markers.moveSelected(point);
-      movingSelected = false;
-    } else {
-      markers.selectObject(undefined);
-    }
-  }
-
-  function handlePointerMove(event: PointerEvent): void {
-    if (!dragCandidate || event.pointerId !== dragCandidate.pointerId) return;
-    event.preventDefault();
-    event.stopPropagation();
-    if (
-      !draggingMarker &&
-      Math.hypot(event.clientX - dragCandidate.x, event.clientY - dragCandidate.y) > 3
-    ) {
-      draggingMarker = true;
-      controls.enabled = false;
-    }
-    if (!draggingMarker) return;
-    const point = terrainPoint(event);
-    if (!point) return;
-    lastDragPoint = point;
-    markers.movePoint(dragCandidate.id, point);
-  }
-
-  function handlePointerUp(event: PointerEvent): void {
-    if (!dragCandidate || event.pointerId !== dragCandidate.pointerId) return;
-    event.preventDefault();
-    event.stopPropagation();
-    if (draggingMarker) {
-      const point = terrainPoint(event) ?? lastDragPoint;
-      if (point) markers.movePoint(dragCandidate.id, point);
-    }
-    finishMarkerInteraction(!draggingMarker);
-  }
-
-  function handlePointerExit(event: PointerEvent): void {
-    if (!dragCandidate || event.pointerId !== dragCandidate.pointerId) return;
-    event.preventDefault();
-    event.stopPropagation();
-    finishMarkerInteraction(false);
-  }
-
-  canvas.addEventListener("pointerdown", handlePointerDown, true);
-  canvas.addEventListener("pointermove", handlePointerMove, true);
-  canvas.addEventListener("pointerup", handlePointerUp, true);
-  canvas.addEventListener("pointerleave", handlePointerExit, true);
-  canvas.addEventListener("pointercancel", handlePointerExit, true);
 
   let frame = 0;
   function animate(): void {
@@ -774,20 +653,16 @@ export function createRouteViewer(): RouteViewer {
     renderStationLines: markers.renderStationLines,
     setView: fit,
     beginMoveSelected() {
-      movingSelected = true;
+      markerInput.beginMoveSelected();
       status.textContent = "선택한 포인트를 이동할 지형 위치를 클릭하세요.";
     },
-    modelPointAt: terrainPointAt,
+    modelPointAt: markerInput.terrainPointAt,
     dispose() {
+      markerInput.dispose();
       cancelAnimationFrame(frame);
       resizeObserver.disconnect();
       themeObserver.disconnect();
       systemDarkTheme.removeEventListener("change", updateSceneBackground);
-      canvas.removeEventListener("pointerdown", handlePointerDown, true);
-      canvas.removeEventListener("pointermove", handlePointerMove, true);
-      canvas.removeEventListener("pointerup", handlePointerUp, true);
-      canvas.removeEventListener("pointerleave", handlePointerExit, true);
-      canvas.removeEventListener("pointercancel", handlePointerExit, true);
       releaseCursorPivot();
       markers.dispose();
       clearContours();
diff --git a/B05_Profile/B05_Profile_UI_Viewer_Marker_Input.ts b/B05_Profile/B05_Profile_UI_Viewer_Marker_Input.ts
new file mode 100644
index 00000000..6ff036bb
--- /dev/null
+++ b/B05_Profile/B05_Profile_UI_Viewer_Marker_Input.ts
@@ -0,0 +1,196 @@
+/* =============================================================================
+ * B05_Profile_UI_Viewer_Marker_Input.ts
+ * 3D 뷰어의 **포인터 입력** — 지형 위 좌표 얻기, 마커 끌기·고르기, 끌어놓기(drop).
+ *
+ * `B05_Profile_UI_Viewer` 에서 떼어낸 몫이다(700줄 제한, 2026-09-02). 카메라·씬 조립과
+ * 코리도 조립은 뷰어에 남고, 여기에는 캔버스 이벤트로 마커를 다루는 흐름만 둔다.
+ * 회전 중심 유틸(`bindCursorPivotControls`)이 "지금 마커를 잡고 있나"를 묻는 창구도
+ * 여기서 낸다(`blocked`).
+ * ========================================================================== */
+
+import * as THREE from "three";
+import type { OrbitControls } from "three/examples/jsm/controls/OrbitControls.js";
+import {
+  sceneToModel,
+  type ModelBounds,
+  type RouteMarkers,
+  type RoutePointKind,
+} from "./B05_Profile_UI_Markers";
+
+export interface MarkerPointerControls {
+  /** 화면 좌표 아래 지형 지점(모델 좌표). 지형·bounds가 없으면 null. */
+  terrainPointAt: (clientX: number, clientY: number) => { x: number; y: number; z: number } | null;
+  /** 다음 클릭으로 선택 포인트를 옮기는 모드로 들어간다. */
+  beginMoveSelected: () => void;
+  /** 마커를 잡고 있거나 이동 대기 중인가 — 회전 중심 유틸이 회전을 넘길 판단에 쓴다. */
+  blocked: () => boolean;
+  /** 등록한 캔버스 이벤트를 모두 떼어낸다. */
+  dispose: () => void;
+}
+
+export function bindMarkerPointerControls(options: {
+  canvas: HTMLCanvasElement;
+  camera: THREE.Camera;
+  controls: OrbitControls;
+  markers: RouteMarkers;
+  getTerrain: () => THREE.Object3D | null;
+  getBounds: () => ModelBounds | null;
+}): MarkerPointerControls {
+  const { canvas, camera, controls, markers, getTerrain, getBounds } = options;
+
+  let movingSelected = false;
+  let dragCandidate: { id: string; pointerId: number; x: number; y: number } | null = null;
+  let draggingMarker = false;
+  let lastDragPoint: { x: number; y: number; z: number } | null = null;
+
+  /** 화면 좌표 → 정규화 장치 좌표(-1~1). */
+  function pointerOf(clientX: number, clientY: number): THREE.Vector2 {
+    const rect = canvas.getBoundingClientRect();
+    return new THREE.Vector2(
+      ((clientX - rect.left) / rect.width) * 2 - 1,
+      -((clientY - rect.top) / rect.height) * 2 + 1,
+    );
+  }
+
+  function terrainPointAt(
+    clientX: number,
+    clientY: number,
+  ): { x: number; y: number; z: number } | null {
+    const terrain = getTerrain();
+    const bounds = getBounds();
+    if (!terrain || !bounds) return null;
+    const raycaster = new THREE.Raycaster();
+    raycaster.setFromCamera(pointerOf(clientX, clientY), camera);
+    const hit = raycaster.intersectObject(terrain, true)[0];
+    return hit ? sceneToModel(hit.point, bounds) : null;
+  }
+
+  function terrainPoint(
+    event: PointerEvent | DragEvent,
+  ): { x: number; y: number; z: number } | null {
+    return terrainPointAt(event.clientX, event.clientY);
+  }
+
+  function handleDragOver(event: DragEvent): void {
+    event.preventDefault();
+  }
+
+  function handleDrop(event: DragEvent): void {
+    event.preventDefault();
+    const kind = event.dataTransfer?.getData("pointType") as RoutePointKind;
+    const point = terrainPoint(event);
+    if (point && ["bp", "ep", "cp", "ap", "fp"].includes(kind)) markers.place(kind, point);
+  }
+
+  function markerHit(event: PointerEvent): THREE.Object3D | undefined {
+    const raycaster = new THREE.Raycaster();
+    raycaster.setFromCamera(pointerOf(event.clientX, event.clientY), camera);
+    return raycaster.intersectObject(markers.group, true)[0]?.object;
+  }
+
+  function finishMarkerInteraction(selectCandidate: boolean): void {
+    if (dragCandidate && (draggingMarker || selectCandidate)) {
+      markers.selectPoint(dragCandidate.id);
+    }
+    if (dragCandidate && canvas.hasPointerCapture(dragCandidate.pointerId)) {
+      canvas.releasePointerCapture(dragCandidate.pointerId);
+    }
+    controls.enabled = true;
+    dragCandidate = null;
+    draggingMarker = false;
+    lastDragPoint = null;
+  }
+
+  function handlePointerDown(event: PointerEvent): void {
+    if (event.button !== 0) return;
+    const hit = markerHit(event);
+    const pointId = markers.pointIdForObject(hit);
+    if (pointId) {
+      dragCandidate = {
+        id: pointId,
+        pointerId: event.pointerId,
+        x: event.clientX,
+        y: event.clientY,
+      };
+      draggingMarker = false;
+      lastDragPoint = null;
+      canvas.setPointerCapture(event.pointerId);
+      event.preventDefault();
+      event.stopPropagation();
+      return;
+    }
+    if (hit) {
+      markers.selectObject(hit);
+      event.stopPropagation();
+      return;
+    }
+    if (movingSelected) {
+      const point = terrainPoint(event);
+      if (point) markers.moveSelected(point);
+      movingSelected = false;
+    } else {
+      markers.selectObject(undefined);
+    }
+  }
+
+  function handlePointerMove(event: PointerEvent): void {
+    if (!dragCandidate || event.pointerId !== dragCandidate.pointerId) return;
+    event.preventDefault();
+    event.stopPropagation();
+    if (
+      !draggingMarker &&
+      Math.hypot(event.clientX - dragCandidate.x, event.clientY - dragCandidate.y) > 3
+    ) {
+      draggingMarker = true;
+      controls.enabled = false;
+    }
+    if (!draggingMarker) return;
+    const point = terrainPoint(event);
+    if (!point) return;
+    lastDragPoint = point;
+    markers.movePoint(dragCandidate.id, point);
+  }
+
+  function handlePointerUp(event: PointerEvent): void {
+    if (!dragCandidate || event.pointerId !== dragCandidate.pointerId) return;
+    event.preventDefault();
+    event.stopPropagation();
+    if (draggingMarker) {
+      const point = terrainPoint(event) ?? lastDragPoint;
+      if (point) markers.movePoint(dragCandidate.id, point);
+    }
+    finishMarkerInteraction(!draggingMarker);
+  }
+
+  function handlePointerExit(event: PointerEvent): void {
+    if (!dragCandidate || event.pointerId !== dragCandidate.pointerId) return;
+    event.preventDefault();
+    event.stopPropagation();
+    finishMarkerInteraction(false);
+  }
+
+  canvas.addEventListener("dragover", handleDragOver);
+  canvas.addEventListener("drop", handleDrop);
+  canvas.addEventListener("pointerdown", handlePointerDown, true);
+  canvas.addEventListener("pointermove", handlePointerMove, true);
+  canvas.addEventListener("pointerup", handlePointerUp, true);
+  canvas.addEventListener("pointerleave", handlePointerExit, true);
+  canvas.addEventListener("pointercancel", handlePointerExit, true);
+
+  return {
+    terrainPointAt,
+    beginMoveSelected: () => {
+      movingSelected = true;
+    },
+    blocked: () => dragCandidate !== null || draggingMarker || movingSelected,
+    dispose: () => {
+      canvas.removeEventListener("dragover", handleDragOver);
+      canvas.removeEventListener("drop", handleDrop);
+      canvas.removeEventListener("pointerdown", handlePointerDown, true);
+      canvas.removeEventListener("pointermove", handlePointerMove, true);
+      canvas.removeEventListener("pointerup", handlePointerUp, true);
+      canvas.removeEventListener("pointerleave", handlePointerExit, true);
+      canvas.removeEventListener("pointercancel", handlePointerExit, true);
+    },
+  };
+}