diff --git a/backend-node/src/services/tableManagementService.ts b/backend-node/src/services/tableManagementService.ts
index 173de022..28da136e 100644
--- a/backend-node/src/services/tableManagementService.ts
+++ b/backend-node/src/services/tableManagementService.ts
@@ -1165,12 +1165,26 @@ export class TableManagementService {
     paramCount: number;
   } | null> {
     try {
-      // 🔧 날짜 범위 문자열 "YYYY-MM-DD|YYYY-MM-DD" 체크 (최우선!)
+      // 🔧 파이프로 구분된 문자열 처리 (다중선택 또는 날짜 범위)
       if (typeof value === "string" && value.includes("|")) {
         const columnInfo = await this.getColumnWebTypeInfo(tableName, columnName);
+        
+        // 날짜 타입이면 날짜 범위로 처리
         if (columnInfo && (columnInfo.webType === "date" || columnInfo.webType === "datetime")) {
           return this.buildDateRangeCondition(columnName, value, paramIndex);
         }
+        
+        // 그 외 타입이면 다중선택(IN 조건)으로 처리
+        const multiValues = value.split("|").filter((v: string) => v.trim() !== "");
+        if (multiValues.length > 0) {
+          const placeholders = multiValues.map((_: string, idx: number) => `$${paramIndex + idx}`).join(", ");
+          logger.info(`🔍 다중선택 필터 적용: ${columnName} IN (${multiValues.join(", ")})`);
+          return {
+            whereClause: `${columnName}::text IN (${placeholders})`,
+            values: multiValues,
+            paramCount: multiValues.length,
+          };
+        }
       }
 
       // 🔧 날짜 범위 객체 {from, to} 체크
diff --git a/frontend/lib/registry/components/table-search-widget/TableSearchWidget.tsx b/frontend/lib/registry/components/table-search-widget/TableSearchWidget.tsx
index e13e3d94..6d513976 100644
--- a/frontend/lib/registry/components/table-search-widget/TableSearchWidget.tsx
+++ b/frontend/lib/registry/components/table-search-widget/TableSearchWidget.tsx
@@ -3,7 +3,7 @@
 import React, { useState, useEffect, useRef } from "react";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
-import { Settings, Filter, Layers, X } from "lucide-react";
+import { Settings, Filter, Layers, X, Check, ChevronsUpDown } from "lucide-react";
 import { useTableOptions } from "@/contexts/TableOptionsContext";
 import { useTableSearchWidgetHeight } from "@/contexts/TableSearchWidgetHeightContext";
 import { ColumnVisibilityPanel } from "@/components/screen/table-options/ColumnVisibilityPanel";
@@ -13,6 +13,9 @@ import { TableFilter } from "@/types/table-options";
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
 import { ModernDatePicker } from "@/components/screen/filters/ModernDatePicker";
 import { useScreenPreview } from "@/contexts/ScreenPreviewContext";
+import { Popover, PopoverContent, PopoverTrigger } from "@/components/ui/popover";
+import { Checkbox } from "@/components/ui/checkbox";
+import { cn } from "@/lib/utils";
 
 interface PresetFilter {
   id: string;
@@ -20,6 +23,7 @@ interface PresetFilter {
   columnLabel: string;
   filterType: "text" | "number" | "date" | "select";
   width?: number;
+  multiSelect?: boolean; // 다중선택 여부 (select 타입에서만 사용)
 }
 
 interface TableSearchWidgetProps {
@@ -280,6 +284,11 @@ export function TableSearchWidget({ component, screenId, onHeightChange }: Table
           }
         }
         
+        // 다중선택 배열을 처리 (파이프로 연결된 문자열로 변환)
+        if (filter.filterType === "select" && Array.isArray(filterValue)) {
+          filterValue = filterValue.join("|");
+        }
+        
         return {
           ...filter,
           value: filterValue || "",
@@ -289,6 +298,7 @@ export function TableSearchWidget({ component, screenId, onHeightChange }: Table
         // 빈 값 체크
         if (!f.value) return false;
         if (typeof f.value === "string" && f.value === "") return false;
+        if (Array.isArray(f.value) && f.value.length === 0) return false;
         return true;
       });
 
@@ -343,12 +353,6 @@ export function TableSearchWidget({ component, screenId, onHeightChange }: Table
       case "select": {
         let options = selectOptions[filter.columnName] || [];
 
-        // 현재 선택된 값이 옵션 목록에 없으면 추가 (데이터 없을 때도 선택값 유지)
-        if (value && !options.find((opt) => opt.value === value)) {
-          const savedLabel = selectedLabels[filter.columnName] || value;
-          options = [{ value, label: savedLabel }, ...options];
-        }
-
         // 중복 제거 (value 기준)
         const uniqueOptions = options.reduce(
           (acc, option) => {
@@ -360,39 +364,86 @@ export function TableSearchWidget({ component, screenId, onHeightChange }: Table
           [] as Array<{ value: string; label: string }>,
         );
 
+        // 항상 다중선택 모드
+        const selectedValues: string[] = Array.isArray(value) ? value : (value ? [value] : []);
+        
+        // 선택된 값들의 라벨 표시
+        const getDisplayText = () => {
+          if (selectedValues.length === 0) return column?.columnLabel || "선택";
+          if (selectedValues.length === 1) {
+            const opt = uniqueOptions.find(o => o.value === selectedValues[0]);
+            return opt?.label || selectedValues[0];
+          }
+          return `${selectedValues.length}개 선택됨`;
+        };
+
+        const handleMultiSelectChange = (optionValue: string, checked: boolean) => {
+          let newValues: string[];
+          if (checked) {
+            newValues = [...selectedValues, optionValue];
+          } else {
+            newValues = selectedValues.filter(v => v !== optionValue);
+          }
+          handleFilterChange(filter.columnName, newValues.length > 0 ? newValues : "");
+        };
+
         return (
-          <Select
-            value={value}
-            onValueChange={(val) => {
-              // 선택한 값의 라벨 저장
-              const selectedOption = uniqueOptions.find((opt) => opt.value === val);
-              if (selectedOption) {
-                setSelectedLabels((prev) => ({
-                  ...prev,
-                  [filter.columnName]: selectedOption.label,
-                }));
-              }
-              handleFilterChange(filter.columnName, val);
-            }}
-          >
-            <SelectTrigger
-              className="h-9 min-h-9 text-xs focus:ring-0 focus:outline-none focus-visible:ring-0 focus-visible:ring-offset-0 focus-visible:outline-none sm:text-sm"
-              style={{ width: `${width}px`, height: "36px", minHeight: "36px", outline: "none", boxShadow: "none" }}
+          <Popover>
+            <PopoverTrigger asChild>
+              <Button
+                variant="outline"
+                role="combobox"
+                className={cn(
+                  "h-9 min-h-9 justify-between text-xs font-normal focus:ring-0 focus:outline-none focus-visible:ring-0 focus-visible:ring-offset-0 sm:text-sm",
+                  selectedValues.length === 0 && "text-muted-foreground"
+                )}
+                style={{ width: `${width}px`, height: "36px", minHeight: "36px", outline: "none", boxShadow: "none" }}
+              >
+                <span className="truncate">{getDisplayText()}</span>
+                <ChevronsUpDown className="ml-2 h-4 w-4 shrink-0 opacity-50" />
+              </Button>
+            </PopoverTrigger>
+            <PopoverContent 
+              className="p-0" 
+              style={{ width: `${width}px` }}
+              align="start"
             >
-              <SelectValue placeholder={column?.columnLabel || "선택"} />
-            </SelectTrigger>
-            <SelectContent>
-              {uniqueOptions.length === 0 ? (
-                <div className="text-muted-foreground px-2 py-1.5 text-xs">옵션 없음</div>
-              ) : (
-                uniqueOptions.map((option, index) => (
-                  <SelectItem key={`${filter.columnName}-${option.value}-${index}`} value={option.value}>
-                    {option.label}
-                  </SelectItem>
-                ))
+              <div className="max-h-60 overflow-auto">
+                {uniqueOptions.length === 0 ? (
+                  <div className="text-muted-foreground px-3 py-2 text-xs">옵션 없음</div>
+                ) : (
+                  <div className="p-1">
+                    {uniqueOptions.map((option, index) => (
+                      <div
+                        key={`${filter.columnName}-multi-${option.value}-${index}`}
+                        className="flex items-center space-x-2 rounded-sm px-2 py-1.5 hover:bg-accent cursor-pointer"
+                        onClick={() => handleMultiSelectChange(option.value, !selectedValues.includes(option.value))}
+                      >
+                        <Checkbox
+                          checked={selectedValues.includes(option.value)}
+                          onCheckedChange={(checked) => handleMultiSelectChange(option.value, checked as boolean)}
+                          onClick={(e) => e.stopPropagation()}
+                        />
+                        <span className="text-xs sm:text-sm">{option.label}</span>
+                      </div>
+                    ))}
+                  </div>
+                )}
+              </div>
+              {selectedValues.length > 0 && (
+                <div className="border-t p-1">
+                  <Button
+                    variant="ghost"
+                    size="sm"
+                    className="w-full h-7 text-xs"
+                    onClick={() => handleFilterChange(filter.columnName, "")}
+                  >
+                    선택 초기화
+                  </Button>
+                </div>
               )}
-            </SelectContent>
-          </Select>
+            </PopoverContent>
+          </Popover>
         );
       }
 
diff --git a/frontend/lib/registry/components/table-search-widget/TableSearchWidgetConfigPanel.tsx b/frontend/lib/registry/components/table-search-widget/TableSearchWidgetConfigPanel.tsx
index 8c4ab6a1..3424abb9 100644
--- a/frontend/lib/registry/components/table-search-widget/TableSearchWidgetConfigPanel.tsx
+++ b/frontend/lib/registry/components/table-search-widget/TableSearchWidgetConfigPanel.tsx
@@ -29,6 +29,7 @@ interface PresetFilter {
   columnLabel: string;
   filterType: "text" | "number" | "date" | "select";
   width?: number;
+  multiSelect?: boolean; // 다중선택 여부 (select 타입에서만 사용)
 }
 
 export function TableSearchWidgetConfigPanel({