diff --git a/src/shared/ui/index.ts b/src/shared/ui/index.ts
index fa105d3..967860b 100644
--- a/src/shared/ui/index.ts
+++ b/src/shared/ui/index.ts
@@ -1,5 +1,5 @@
 export { Button } from "./button";
-export { Input } from "./input";
+export { Input, Textarea, Select } from "./inputBox/inputBox";
 export { DropdownMenu, SelectDropdown } from "./dropdown";
 export { Pagination } from "./pagination/pagination";
 export type { PaginationProps } from "./pagination/pagination";
@@ -10,5 +10,8 @@ export type { NavigationProps, NavItem, NavUser } from "./navigation/navigation"
 export * from "./form";
 export * from "./checkbox";
 export * from "./file-uploader";
+
+// Modal components
+export * from "./modal";
 export { Tabs } from "./tabs/tabs";
 export type { TabsProps, TabItem, TabVariant } from "./tabs/tabs";
diff --git a/src/shared/ui/lists/lists.stories.tsx b/src/shared/ui/lists/lists.stories.tsx
index 874296f..5c9ba8e 100644
--- a/src/shared/ui/lists/lists.stories.tsx
+++ b/src/shared/ui/lists/lists.stories.tsx
@@ -155,8 +155,7 @@ const InteractiveTable = (): React.ReactElement => {
   const [data, setData] = useState<TableRowData[]>(initialTableData);
 
   const selectableRows = data.filter((r) => !r.isDisabled);
-  const isAllChecked =
-    selectableRows.length > 0 && selectableRows.every((r) => r.isSelected);
+  const isAllChecked = selectableRows.length > 0 && selectableRows.every((r) => r.isSelected);
 
   const handleRowCheck = (id: string, isChecked: boolean) => {
     setData((prev) => prev.map((row) => (row.id === id ? { ...row, isSelected: isChecked } : row)));
diff --git a/src/shared/ui/modal/index.ts b/src/shared/ui/modal/index.ts
new file mode 100644
index 0000000..031608e
--- /dev/null
+++ b/src/shared/ui/modal/index.ts
@@ -0,0 +1 @@
+export * from "./modal";
diff --git a/src/shared/ui/modal/modal.stories.tsx b/src/shared/ui/modal/modal.stories.tsx
new file mode 100644
index 0000000..2d0568a
--- /dev/null
+++ b/src/shared/ui/modal/modal.stories.tsx
@@ -0,0 +1,165 @@
+import { useState } from "react";
+import type { Meta, StoryObj } from "@storybook/react-vite";
+import { Modal, ModalHeader, ModalContent, ModalFooter } from "./modal";
+import { Button } from "@/shared/ui/button/button";
+import { Checkbox } from "@/shared/ui/checkbox/checkbox";
+import { FormField, FormLabel } from "@/shared/ui/form";
+import { Input, Textarea, Select } from "@/shared/ui/inputBox/inputBox";
+
+const meta = {
+  title: "Shared/UI/Modal",
+  component: Modal,
+  parameters: {
+    layout: "centered",
+  },
+  tags: ["autodocs"],
+} satisfies Meta<typeof Modal>;
+
+export default meta;
+type Story = StoryObj<typeof meta>;
+
+// --- 1. Portfolio Filter Modal Example ---
+const FilterModalExample = ({
+  isOpen: propsIsOpen,
+  onClose: propsOnClose,
+}: {
+  isOpen?: boolean;
+  onClose?: () => void;
+}) => {
+  const [internalIsOpen, setInternalIsOpen] = useState(false);
+  const isOpen = propsIsOpen ?? internalIsOpen;
+  const onClose = propsOnClose ?? (() => setInternalIsOpen(false));
+
+  const categories = ["웹 개발", "모바일 앱", "UI/UX 디자인", "데이터 분석", "AI/ML", "게임 개발"];
+  const departments = ["소프트웨어학과", "미디어학과", "산업공학과", "경영학과"];
+
+  return (
+    <>
+      {!propsIsOpen && <Button onClick={() => setInternalIsOpen(true)}>필터 모달 열기</Button>}
+      <Modal isOpen={isOpen} onClose={onClose}>
+        <ModalHeader title="필터 선택" onClose={onClose} />
+        <ModalContent className="space-y-8">
+          <div className="space-y-4">
+            <h3 className="text-[16px] font-semibold text-[var(--color-gray-800,#333)]">
+              카테고리
+            </h3>
+            <div className="grid grid-cols-2 gap-3">
+              <Checkbox label="전체" className="col-span-2" defaultChecked />
+              {categories.map((cat) => (
+                <Checkbox key={cat} label={cat} />
+              ))}
+            </div>
+          </div>
+
+          <div className="h-px bg-[var(--color-gray-100,#f2f2f2)]" />
+
+          <div className="space-y-4">
+            <h3 className="text-[16px] font-semibold text-[var(--color-gray-800,#333)]">학과</h3>
+            <div className="grid grid-cols-2 gap-3">
+              <Checkbox label="전체" className="col-span-2" defaultChecked />
+              {departments.map((dept) => (
+                <Checkbox key={dept} label={dept} />
+              ))}
+            </div>
+          </div>
+        </ModalContent>
+        <ModalFooter>
+          <Button variant="ghost" onClick={onClose}>
+            초기화
+          </Button>
+          <Button variant="secondary" onClick={onClose}>
+            취소
+          </Button>
+          <Button variant="primary" onClick={onClose} className="px-8">
+            적용
+          </Button>
+        </ModalFooter>
+      </Modal>
+    </>
+  );
+};
+
+export const FilterModal: Story = {
+  render: (args) => <FilterModalExample {...args} />,
+  args: {
+    isOpen: false,
+    onClose: () => {},
+    children: null, // 필수 속성 추가
+  },
+};
+
+// --- 2. Profile Edit Modal Example ---
+const ProfileEditModalExample = ({
+  isOpen: propsIsOpen,
+  onClose: propsOnClose,
+}: {
+  isOpen?: boolean;
+  onClose?: () => void;
+}) => {
+  const [internalIsOpen, setInternalIsOpen] = useState(false);
+  const isOpen = propsIsOpen ?? internalIsOpen;
+  const onClose = propsOnClose ?? (() => setInternalIsOpen(false));
+
+  return (
+    <>
+      {!propsIsOpen && (
+        <Button variant="secondary" onClick={() => setInternalIsOpen(true)}>
+          프로필 편집 열기
+        </Button>
+      )}
+      <Modal isOpen={isOpen} onClose={onClose} className="max-w-[500px]">
+        <ModalHeader title="프로필 편집" onClose={onClose} />
+        <ModalContent className="space-y-5">
+          <FormField>
+            <FormLabel>이름</FormLabel>
+            <Input defaultValue="김철수" />
+          </FormField>
+
+          <FormField>
+            <FormLabel>이메일</FormLabel>
+            <Input type="email" defaultValue="chulsoo.kim@ajou.ac.kr" />
+          </FormField>
+
+          <FormField>
+            <FormLabel>소속</FormLabel>
+            <Input defaultValue="아주대학교 소프트웨어학과" />
+          </FormField>
+
+          <FormField>
+            <FormLabel>회원 종류</FormLabel>
+            <Select
+              options={[
+                { label: "학생", value: "학생" },
+                { label: "교수", value: "교수" },
+                { label: "기업", value: "기업" },
+              ]}
+              defaultValue="학생"
+            />
+          </FormField>
+
+          <FormField>
+            <FormLabel>자기소개</FormLabel>
+            <Textarea defaultValue="웹 개발과 UI/UX 디자인에 관심이 많은 학생입니다." rows={4} />
+          </FormField>
+        </ModalContent>
+        <ModalFooter>
+          <Button variant="secondary" onClick={onClose}>
+            취소
+          </Button>
+          <Button variant="primary" onClick={onClose} className="px-8">
+            저장
+          </Button>
+        </ModalFooter>
+      </Modal>
+    </>
+  );
+};
+
+export const ProfileEditModal: Story = {
+  render: (args) => <ProfileEditModalExample {...args} />,
+  args: {
+    isOpen: false,
+    onClose: () => {},
+    children: null, // 필수 속성 추가
+  },
+};
diff --git a/src/shared/ui/modal/modal.tsx b/src/shared/ui/modal/modal.tsx
new file mode 100644
index 0000000..9122e77
--- /dev/null
+++ b/src/shared/ui/modal/modal.tsx
@@ -0,0 +1,135 @@
+import React, { useEffect, useId } from "react";
+import { createPortal } from "react-dom";
+import { XIcon } from "@/shared/ui/icons";
+
+// --- Global State for Nested Modals ---
+let modalOpenCount = 0;
+let originalOverflow = "";
+
+// --- Types ---
+export type ModalProps = {
+  isOpen: boolean;
+  onClose: () => void;
+  children: React.ReactNode;
+  className?: string;
+  titleId?: string; // 접근성을 위한 ID
+};
+
+export type ModalHeaderProps = {
+  title?: string;
+  onClose?: () => void;
+  children?: React.ReactNode;
+  className?: string;
+  id?: string; // h2에 부여될 ID
+};
+
+export type ModalContentProps = {
+  children: React.ReactNode;
+  className?: string;
+};
+
+export type ModalFooterProps = {
+  children: React.ReactNode;
+  className?: string;
+};
+
+// --- Styles ---
+
+const overlayBaseClasses =
+  "fixed inset-0 z-[100] bg-black/50 backdrop-blur-sm transition-opacity duration-300 flex items-center justify-center p-4";
+
+const modalBaseClasses =
+  "bg-white rounded-xl shadow-xl w-full max-w-[600px] max-h-[90vh] flex flex-col overflow-hidden animate-in fade-in zoom-in-95 duration-200";
+
+const headerBaseClasses =
+  "flex items-center justify-between px-6 py-4 border-b border-[var(--color-gray-100,#f2f2f2)]";
+const contentBaseClasses = "flex-1 overflow-y-auto px-6 py-6";
+const footerBaseClasses =
+  "px-6 py-4 border-t border-[var(--color-gray-100,#f2f2f2)] flex justify-end gap-2";
+
+const getClasses = (...classes: (string | undefined)[]) => classes.filter(Boolean).join(" ");
+
+// --- Components ---
+
+export const Modal = ({ isOpen, onClose, children, className }: ModalProps) => {
+  const generatedId = useId();
+  const titleId = `modal-title-${generatedId}`;
+
+  useEffect(() => {
+    if (!isOpen) return;
+
+    // ESC 키 대응
+    const handleEsc = (e: KeyboardEvent) => {
+      if (e.key === "Escape") onClose();
+    };
+
+    // 스크롤 잠금 (중첩 모달 대응)
+    if (modalOpenCount === 0) {
+      originalOverflow = document.body.style.overflow;
+      document.body.style.overflow = "hidden";
+    }
+    modalOpenCount++;
+
+    window.addEventListener("keydown", handleEsc);
+
+    return () => {
+      modalOpenCount--;
+      if (modalOpenCount === 0) {
+        document.body.style.overflow = originalOverflow;
+      }
+      window.removeEventListener("keydown", handleEsc);
+    };
+  }, [isOpen, onClose]);
+
+  if (!isOpen) return null;
+
+  // 자식 요소들에 titleId를 주입하기 위해 React.Children.map 사용 (ModalHeader 탐색)
+  const childrenWithA11y = React.Children.map(children, (child) => {
+    if (React.isValidElement(child) && child.type === ModalHeader) {
+      return React.cloneElement(child as React.ReactElement<ModalHeaderProps>, { id: titleId });
+    }
+    return child;
+  });
+
+  return createPortal(
+    <div className={overlayBaseClasses} onClick={(e) => e.target === e.currentTarget && onClose()}>
+      <div
+        role="dialog"
+        aria-modal="true"
+        aria-labelledby={titleId}
+        className={getClasses(modalBaseClasses, className)}
+      >
+        {childrenWithA11y}
+      </div>
+    </div>,
+    document.body,
+  );
+};
+
+export const ModalHeader = ({ title, onClose, children, className, id }: ModalHeaderProps) => (
+  <div className={getClasses(headerBaseClasses, className)}>
+    {title && (
+      <h2 id={id} className="text-[20px] font-bold text-[var(--color-gray-900,#111)]">
+        {title}
+      </h2>
+    )}
+    {children}
+    {onClose && (
+      <button
+        onClick={onClose}
+        className="p-1 rounded-md text-[var(--color-gray-400,#999)] hover:text-[var(--color-gray-600,#666)] hover:bg-[var(--color-gray-100,#f2f2f2)] transition-colors"
+        aria-label="Close modal"
+      >
+        <XIcon size={24} />
+      </button>
+    )}
+  </div>
+);
+
+export const ModalContent = ({ children, className }: ModalContentProps) => (
+  <div className={getClasses(contentBaseClasses, className)}>{children}</div>
+);
+
+export const ModalFooter = ({ children, className }: ModalFooterProps) => (
+  <div className={getClasses(footerBaseClasses, className)}>{children}</div>
+);