diff --git a/src/common/component/Input/Input.style.ts b/src/common/component/Input/Input.style.ts
index 88710d948..fad9872b3 100644
--- a/src/common/component/Input/Input.style.ts
+++ b/src/common/component/Input/Input.style.ts
@@ -3,14 +3,27 @@ import { css } from '@emotion/react';
 import { InputProps } from '@/common/component/Input/Input';
 import { theme } from '@/common/style/theme/theme';
 
-export const inputContainerStyle = css({
+export const containerStyle = css({
   display: 'flex',
   flexDirection: 'column',
 
-  gap: '1.2rem',
+  gap: '0.8rem',
+
+  width: '100%',
+
+  '& > div': {
+    marginTop: '0.4rem',
+  },
+});
+
+export const inputSupportStyle = css({
+  display: 'flex',
+  flexDirection: 'column',
+
+  gap: '0.8rem',
 });
 
-export const inputWarpperStyle = css({
+export const warpperStyle = css({
   display: 'flex',
   alignItems: 'center',
 
@@ -23,22 +36,26 @@ export const inputStyle = css({
   border: 'none',
   backgroundColor: 'transparent',
   fontWeight: 400,
+  ...theme.text.body03,
 
   outline: 'none',
 
   '::placeholder': {
     color: theme.colors.gray_500,
+    ...theme.text.body03,
   },
 });
 
-export const variantStyle = (variant: Required<InputProps>['variant']) => {
+export const variantStyle = ({ variant, isError }: { variant: Required<InputProps>['variant']; isError: boolean }) => {
+  const borderColor = isError ? `${theme.colors.red}` : `${theme.colors.gray_400}`;
+
   const style = {
-    outline: {
-      boxShadow: ` 0px 0px 0px 1px ${theme.colors.gray_400}`,
+    default: {
+      boxShadow: `inset 0px 0px 0px 1px ${borderColor}`,
       borderRadius: '8px',
     },
     underline: {
-      boxShadow: ` 0px 1px 0px ${theme.colors.gray_400}`,
+      boxShadow: `0px 1px 0px ${borderColor}`,
     },
     colored: {
       borderRadius: '100px',
@@ -51,9 +68,9 @@ export const variantStyle = (variant: Required<InputProps>['variant']) => {
 
 export const sizeStyle = (size: Required<InputProps>['size']) => {
   const style = {
-    small: { padding: '0.8rem 1.2rem', ...theme.text.body04 },
-    medium: { padding: '1.2rem 1.2rem', ...theme.text.body02 },
-    large: { padding: '1.2rem 1.6rem', ...theme.text.body02 },
+    small: { padding: '0.8rem 1.2rem' },
+    medium: { padding: '1.2rem 1.2rem' },
+    large: { padding: '1.2rem 1.6rem' },
   };
 
   return style[size];
diff --git a/src/common/component/Input/Input.tsx b/src/common/component/Input/Input.tsx
index 0604200f5..c3c7a8e7e 100644
--- a/src/common/component/Input/Input.tsx
+++ b/src/common/component/Input/Input.tsx
@@ -1,35 +1,56 @@
-import React, { InputHTMLAttributes } from 'react';
+import React, { ForwardedRef, InputHTMLAttributes, forwardRef } from 'react';
 
 import {
-  inputContainerStyle,
+  containerStyle,
   inputStyle,
-  inputWarpperStyle,
+  inputSupportStyle,
   sizeStyle,
   variantStyle,
+  warpperStyle,
 } from '@/common/component/Input/Input.style';
 import Label from '@/common/component/Label/Label';
+import SupportingText from '@/common/component/SupportingText/SupportingText';
 
 type InputSize = 'small' | 'medium' | 'large';
-type InputVariant = 'outline' | 'underline' | 'colored';
+type InputVariant = 'default' | 'underline' | 'colored';
 
 export interface InputProps extends Omit<InputHTMLAttributes<HTMLInputElement>, 'size'> {
-  variant: InputVariant;
+  variant?: InputVariant;
   size?: InputSize; //default: medium(p: 1.2rem)
   label?: string;
   LeftIcon?: React.FunctionComponent<React.SVGProps<SVGSVGElement>>; //svg 컴포넌트
   isError?: boolean;
+  isNotice?: boolean;
+  supportingText?: string;
 }
 
-const Input = ({ variant, size = 'medium', label, LeftIcon, ...props }: InputProps) => {
+const Input = (
+  {
+    variant = 'default',
+    size = 'medium',
+    label,
+    LeftIcon,
+    isError = false,
+    isNotice = false,
+    supportingText,
+    ...props
+  }: InputProps,
+  ref: ForwardedRef<HTMLInputElement>
+) => {
   return (
-    <article css={inputContainerStyle}>
+    <article css={containerStyle}>
       {label && <Label id={label}>{label}</Label>}
-      <div css={[inputWarpperStyle, variantStyle(variant), sizeStyle(size)]}>
+      <div css={[warpperStyle, variantStyle({ variant, isError }), sizeStyle(size)]}>
         {LeftIcon && <LeftIcon />}
-        <input css={[inputStyle]} {...props} />
+        <input ref={ref} css={inputStyle} {...props} />
       </div>
+      {supportingText && (
+        <SupportingText isError={isError} isNotice={isNotice}>
+          {supportingText}
+        </SupportingText>
+      )}
     </article>
   );
 };
 
-export default Input;
+export default forwardRef(Input);
diff --git a/src/common/component/SupportingText/SupportingText.style.ts b/src/common/component/SupportingText/SupportingText.style.ts
new file mode 100644
index 000000000..a7de252b4
--- /dev/null
+++ b/src/common/component/SupportingText/SupportingText.style.ts
@@ -0,0 +1,9 @@
+import { css } from '@emotion/react';
+
+import { theme } from '@/common/style/theme/theme';
+
+export const textStyle = (isError: boolean, isNotice: boolean) => {
+  const textColor = isError ? theme.colors.red : isNotice ? theme.colors.blue_900 : theme.colors.gray_400;
+
+  return css({ color: textColor, wordBreak: 'break-word', ...theme.text.body04 });
+};
diff --git a/src/common/component/SupportingText/SupportingText.tsx b/src/common/component/SupportingText/SupportingText.tsx
new file mode 100644
index 000000000..ddf0998c0
--- /dev/null
+++ b/src/common/component/SupportingText/SupportingText.tsx
@@ -0,0 +1,14 @@
+import { ComponentPropsWithoutRef } from 'react';
+
+import { textStyle } from '@/common/component/SupportingText/SupportingText.style';
+
+interface SupportingTextProps extends ComponentPropsWithoutRef<'p'> {
+  isError?: boolean;
+  isNotice?: boolean;
+}
+
+const SupportingText = ({ isError = false, isNotice = false, children }: SupportingTextProps) => {
+  return <p css={textStyle(isError, isNotice)}>{children}</p>;
+};
+
+export default SupportingText;
diff --git a/src/story/common/Input.stories.tsx b/src/story/common/Input.stories.tsx
index a9dbd1ab1..6edc032a4 100644
--- a/src/story/common/Input.stories.tsx
+++ b/src/story/common/Input.stories.tsx
@@ -1,5 +1,7 @@
 import type { Meta, StoryObj } from '@storybook/react';
 
+import { useEffect, useRef } from 'react';
+
 import Input from '@/common/component/Input/Input';
 
 const meta = {
@@ -11,9 +13,12 @@ const meta = {
   args: {
     type: 'text',
     placeholder: 'placeholder',
-    width: 20,
     label: 'label',
     variant: 'underline',
+    size: 'medium',
+    isError: false,
+    isNotice: false,
+    supportingText: '',
   },
   argTypes: {},
 } satisfies Meta<typeof Input>;
@@ -21,4 +26,15 @@ const meta = {
 export default meta;
 type Story = StoryObj<typeof meta>;
 
-export const Default: Story = {};
+export const Default: Story = {
+  render: (args) => {
+    const inputRef = useRef<HTMLInputElement>(null);
+    useEffect(() => {
+      if (inputRef.current) {
+        inputRef.current.focus();
+      }
+    }, []);
+
+    return <Input ref={inputRef} {...args} />;
+  },
+};