diff --git a/frontend/components/screen/ScreenRelationFlow.tsx b/frontend/components/screen/ScreenRelationFlow.tsx
index 9f75874a..09c980df 100644
--- a/frontend/components/screen/ScreenRelationFlow.tsx
+++ b/frontend/components/screen/ScreenRelationFlow.tsx
@@ -1488,6 +1488,32 @@ function ScreenRelationFlowInner({ screen, selectedGroup, initialFocusedScreenId
       });
     }
     
+    // lookup 필터 OFF일 때: lookup 연결만 있는 테이블 노드를 dim 처리
+    const lookupOnlyNodes = new Set<string>();
+    if (!edgeFilterState.lookup) {
+      const nodeEdgeCategories = new Map<string, Set<EdgeCategory>>();
+      edges.forEach((edge) => {
+        const category = (edge.data as any)?.edgeCategory as EdgeCategory | undefined;
+        if (!category) return;
+        [edge.source, edge.target].forEach((nodeId) => {
+          if (!nodeEdgeCategories.has(nodeId)) {
+            nodeEdgeCategories.set(nodeId, new Set());
+          }
+          nodeEdgeCategories.get(nodeId)!.add(category);
+        });
+      });
+      nodeEdgeCategories.forEach((categories, nodeId) => {
+        if (nodeId.startsWith("table-") || nodeId.startsWith("subtable-")) {
+          const hasVisibleCategory = Array.from(categories).some(
+            (cat) => cat !== "lookup" && edgeFilterState[cat]
+          );
+          if (!hasVisibleCategory) {
+            lookupOnlyNodes.add(nodeId);
+          }
+        }
+      });
+    }
+    
     return nodes.map((node) => {
       // 화면 노드 스타일링 (포커스가 있을 때만)
       if (node.id.startsWith("screen-")) {
@@ -1783,7 +1809,7 @@ function ScreenRelationFlowInner({ screen, selectedGroup, initialFocusedScreenId
             ...node.data,
             isFocused: isFocusedTable,
             isRelated: isRelatedTable,
-            isFaded: focusedScreenId !== null && !isActiveTable,
+            isFaded: (focusedScreenId !== null && !isActiveTable) || lookupOnlyNodes.has(node.id),
             highlightedColumns: isActiveTable ? highlightedColumns : [],
             joinColumns: isActiveTable ? joinColumns : [],
             joinColumnRefs: focusedJoinColumnRefs.length > 0 ? focusedJoinColumnRefs : undefined,  // 조인 컬럼 참조 정보
@@ -1894,7 +1920,7 @@ function ScreenRelationFlowInner({ screen, selectedGroup, initialFocusedScreenId
           data: {
             ...node.data,
             isFocused: isActiveSubTable,
-            isFaded: !isActiveSubTable,
+            isFaded: !isActiveSubTable || lookupOnlyNodes.has(node.id),
             highlightedColumns: isActiveSubTable ? subTableHighlightedColumns : [],
             joinColumns: isActiveSubTable ? subTableJoinColumns : [],
             fieldMappings: isActiveSubTable ? displayFieldMappings : [],
@@ -1905,7 +1931,7 @@ function ScreenRelationFlowInner({ screen, selectedGroup, initialFocusedScreenId
       
       return node;
     });
-  }, [nodes, selectedGroup, focusedScreenId, screenSubTableMap, subTablesDataMap, screenUsedColumnsMap, screenTableMap, tableColumns]);
+  }, [nodes, selectedGroup, focusedScreenId, screenSubTableMap, subTablesDataMap, screenUsedColumnsMap, screenTableMap, tableColumns, edgeFilterState, edges]);
   
   // 포커스에 따른 엣지 스타일링 (그룹 모드 & 개별 화면 모드)
   const styledEdges = React.useMemo(() => {
@@ -2304,8 +2330,19 @@ function ScreenRelationFlowInner({ screen, selectedGroup, initialFocusedScreenId
     });
     
     // 기존 엣지 + 조인 관계 엣지 합치기
-    return [...styledOriginalEdges, ...joinEdges];
-  }, [edges, nodes, selectedGroup, focusedScreenId, screen, screenSubTableMap, subTablesDataMap, screenTableMap]);
+    const allEdges = [...styledOriginalEdges, ...joinEdges];
+    // 엣지 필터 적용 (edgeFilterState에 따라 숨김)
+    return allEdges.map((edge) => {
+      const category = (edge.data as any)?.edgeCategory as EdgeCategory | undefined;
+      if (category && !edgeFilterState[category]) {
+        return {
+          ...edge,
+          hidden: true,
+        };
+      }
+      return edge;
+    });
+  }, [edges, nodes, selectedGroup, focusedScreenId, screen, screenSubTableMap, subTablesDataMap, screenTableMap, edgeFilterState]);
 
   // 그룹의 화면 목록 (데이터 흐름 설정용) - 모든 조건부 return 전에 선언해야 함
   const groupScreensList = React.useMemo(() => {
@@ -2385,6 +2422,37 @@ function ScreenRelationFlowInner({ screen, selectedGroup, initialFocusedScreenId
               <span className="text-xs text-muted-foreground font-mono">{screen.screenCode}</span>
             </>
           )}
+
+          <div className="h-4 w-px bg-border/30 mx-1" />
+          <span className="text-[10px] font-medium text-muted-foreground/50">연결</span>
+
+          {(
+            [
+              { key: "main" as EdgeCategory, label: "메인", color: "bg-primary", defaultOn: true },
+              { key: "filter" as EdgeCategory, label: "마스터-디테일", color: "bg-[hsl(var(--info))]", defaultOn: true },
+              { key: "join" as EdgeCategory, label: "엔티티 조인", color: "bg-amber-400", defaultOn: true },
+              { key: "lookup" as EdgeCategory, label: "코드 참조", color: "bg-warning", defaultOn: false },
+            ] as const
+          ).map(({ key, label, color, defaultOn }) => {
+            const isOn = edgeFilterState[key];
+            const count = edges.filter((e) => (e.data as any)?.edgeCategory === key).length;
+            return (
+              <button
+                key={key}
+                type="button"
+                onClick={() => setEdgeFilterState((prev) => ({ ...prev, [key]: !prev[key] }))}
+                className={`inline-flex items-center gap-1.5 px-2.5 py-1 rounded-full text-[10px] font-medium transition-all duration-200 ${
+                  isOn
+                    ? "bg-foreground/5 border border-border/20 text-foreground/80"
+                    : `border text-muted-foreground/40 ${!defaultOn ? "border-dashed border-border/20" : "border-border/10"}`
+                }`}
+              >
+                <span className={`w-1.5 h-1.5 rounded-full ${color} transition-opacity ${isOn ? "opacity-100 shadow-sm" : "opacity-30"}`} />
+                {label}
+                <span className="text-[9px] text-muted-foreground/40 font-mono">{count}</span>
+              </button>
+            );
+          })}
         </div>
       )}
       {/* isViewReady가 false면 숨김 처리하여 깜빡임 방지 */}
@@ -2434,28 +2502,6 @@ function ScreenRelationFlowInner({ screen, selectedGroup, initialFocusedScreenId
             marginBottom: "8px",
           }}
         />
-        {/* 관계 범례 */}
-        <div className="absolute bottom-4 left-4 z-10 rounded-lg border bg-card/90 backdrop-blur-sm p-3 shadow-md">
-          <p className="text-[10px] font-medium text-muted-foreground mb-2">관계 유형</p>
-          <div className="flex flex-col gap-1.5">
-            <div className="flex items-center gap-2">
-              <div className="h-0.5 w-6 rounded-full bg-primary" />
-              <span className="text-[10px] text-muted-foreground">메인 테이블</span>
-            </div>
-            <div className="flex items-center gap-2">
-              <div className="h-0.5 w-6 rounded-full bg-primary/50" />
-              <span className="text-[10px] text-muted-foreground">마스터-디테일</span>
-            </div>
-            <div className="flex items-center gap-2">
-              <div className="h-0.5 w-6 rounded-full bg-warning" />
-              <span className="text-[10px] text-muted-foreground">코드 참조</span>
-            </div>
-            <div className="flex items-center gap-2">
-              <div className="h-0.5 w-6 rounded-full bg-success" />
-              <span className="text-[10px] text-muted-foreground">엔티티 조인</span>
-            </div>
-          </div>
-        </div>
       </ReactFlow>
       </div>