diff --git a/resources/views/rd/planning-design/index.blade.php b/resources/views/rd/planning-design/index.blade.php
index 29946888..4ae9801a 100644
--- a/resources/views/rd/planning-design/index.blade.php
+++ b/resources/views/rd/planning-design/index.blade.php
@@ -1530,7 +1530,7 @@
                                          @mousedown="sbCanvasMouseDown($event)"
                                          @mousemove="sbCanvasMouseMove($event)"
                                          @mouseup="sbCanvasMouseUp($event)"
-                                         @click.self="sbSelectedBlock = null; sbMultiSelected = []"
+                                         @click.self="if(!_sbLassoDone){ sbSelectedBlock = null; sbMultiSelected = []; } _sbLassoDone = false;"
                                          style="min-height: 600px;">
                                         {{-- Lasso rectangle --}}
                                         <div class="sb-lasso-rect" x-show="_sbLasso" x-cloak
@@ -2000,6 +2000,7 @@ function planningCanvas() {
         _sbMenuResize: null,
         sbMultiSelected: [],   // 다중 선택 블록 id 배열
         _sbLasso: null,        // { startX, startY, rx, ry, rw, rh }
+        _sbLassoDone: false,   // 올가미 완료 직후 click.self 방지 플래그
         _sbMultiDrag: null,    // { startX, startY, origins: [{id, x, y}] }
         _sbHistory: [],
         _sbHistoryIdx: -1,
@@ -3066,8 +3067,9 @@ function planningCanvas() {
         },
 
         sbCanvasMouseDown(e) {
-            // 빈 캔버스 클릭 시 올가미 시작
-            if (e.target === this.$refs.sbCanvas || e.target.classList.contains('sb-blk-empty-area')) {
+            // 블록이나 리사이즈 핸들 위가 아니면 올가미 시작
+            const onBlock = e.target.closest('.sb-block');
+            if (!onBlock) {
                 this.sbEditingBlock = null;
                 const rect = this.$refs.sbCanvas.getBoundingClientRect();
                 const scrollL = this.$refs.sbCanvas.scrollLeft;
@@ -3156,6 +3158,7 @@ function planningCanvas() {
                     }
                 }
                 this._sbLasso = null;
+                this._sbLassoDone = true;
                 return;
             }
             // 다중 드래그 완료