diff --git a/src/components/global/CustomButton/CustomButton.tsx b/src/components/global/CustomButton/CustomButton.tsx
index 1efbc578..da3f531f 100644
--- a/src/components/global/CustomButton/CustomButton.tsx
+++ b/src/components/global/CustomButton/CustomButton.tsx
@@ -2,7 +2,6 @@
 import React from 'react';
 import styled, { css, keyframes } from 'styled-components';
 import { colors } from '../../../style/color';
-
 interface CustomButtonProps {
   /**
    * 버튼 내부 텍스트
@@ -55,6 +54,7 @@ const Button = styled.button<{
   transition: all 0.2s ease-in-out;
   cursor: pointer;
   width: ${props => props.$fullWidth ? '100%' : 'auto'};
+  color: ${colors.white};
 
   // 크기 설정
   ${props => {
@@ -62,19 +62,19 @@ const Button = styled.button<{
       case 'small':
         return css`
           padding: 8px 16px;
-          font-size: 14px;
+          font-size: 10px;
           height: 32px;
         `;
       case 'large':
         return css`
           padding: 16px 32px;
-          font-size: 18px;
+          font-size: 12px;
           height: 48px;
         `;
       default: // medium
         return css`
           padding: 12px 24px;
-          font-size: 16px;
+          font-size: 12px;
           height: 40px;
         `;
     }
@@ -114,14 +114,13 @@ const Button = styled.button<{
       default: // primary
         return css`
           background-color: ${colors.blue200};
-          color: white;
           border: none;
-          box-shadow: 0 2px 4px rgba(79, 70, 229, 0.1);
+          box-shadow: 0 2px 4px ${colors.blue100};
           
           &:hover:not(:disabled) {
-            background-color:blue;
+            background-color: ${colors.blue200};
             transform: translateY(-1px);
-            box-shadow: 0 4px 6px rgba(79, 70, 229, 0.2);
+            box-shadow: 0 4px 6px ${colors.blue100};
           }
           
           &:active:not(:disabled) {
@@ -138,7 +137,7 @@ const Button = styled.button<{
 
   &:focus {
     outline: none;
-    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.3);
+    box-shadow: 0 0 0 3px ${colors.blue100};
   }
 `;
 
diff --git a/src/components/global/CustomInput/CustomInput.stories.tsx b/src/components/global/CustomInput/CustomInput.stories.tsx
index 02a84ee7..0f104af3 100644
--- a/src/components/global/CustomInput/CustomInput.stories.tsx
+++ b/src/components/global/CustomInput/CustomInput.stories.tsx
@@ -1,7 +1,7 @@
 // CustomInput.stories.tsx
 import type { Meta, StoryObj } from '@storybook/react';
 import { CustomInput } from './CustomInput';
-
+import { CustomButton } from '../CustomButton/CustomButton';
 const meta = {
   title: 'Components/CustomInput',
   component: CustomInput,
@@ -113,4 +113,18 @@ export const Playground: Story = {
     error: '',
     hint: '',
   },
+};
+
+
+export const WithSuffix: Story = {
+  args: {
+    label: '제목',
+    placeholder: '값을 입력해주세요',
+    variant: 'underlined',
+    suffix: (
+      <CustomButton  size="small">
+        확인
+      </CustomButton>
+    ),
+  },
 };
\ No newline at end of file
diff --git a/src/components/global/CustomInput/CustomInput.tsx b/src/components/global/CustomInput/CustomInput.tsx
index da9f18c2..90a93832 100644
--- a/src/components/global/CustomInput/CustomInput.tsx
+++ b/src/components/global/CustomInput/CustomInput.tsx
@@ -1,7 +1,9 @@
-// CustomInput.tsx
-import { InputHTMLAttributes } from 'react';
+
+import React, { InputHTMLAttributes, ReactNode } from 'react';
 import styled, { css, keyframes } from 'styled-components';
+import { typography } from '../../../style/typography';
 import { colors } from '../../../style/color';
+import theme from '../../../style/theme';
 
 interface CustomInputProps extends Omit<InputHTMLAttributes<HTMLInputElement>, 'size'> {
   /**
@@ -20,10 +22,18 @@ interface CustomInputProps extends Omit<InputHTMLAttributes<HTMLInputElement>, '
    * 너비를 100%로 설정
    */
   fullWidth?: boolean;
-    /**
+  /**
    * 입력 필드 스타일 변형
    */
   variant?: 'outlined' | 'underlined';
+  /**
+   * 입력 필드 오른쪽에 추가할 요소
+   */
+  suffix?: ReactNode;
+  /**
+   * 버튼을 포함하는 경우, marginBottom 설정
+   */
+  hasButton?: boolean;
 }
 
 const fadeIn = keyframes`
@@ -37,67 +47,105 @@ const fadeIn = keyframes`
   }
 `;
 
-const Container = styled.div<{ $fullWidth: boolean }>`
+const Container = styled.div<{ $fullWidth: boolean; $hasButton: boolean }>`
   display: flex;
   flex-direction: column;
-  width: ${props => props.$fullWidth ? '100%' : 'auto'};
+  width: ${({ $fullWidth }) => ($fullWidth ? '100%' : theme.size.maxWidth || 'auto')};
+  ${({ $hasButton }) => $hasButton && css`
+    margin-bottom: 10px; /* 버튼이 있을 때 margin-bottom을 10px 추가 */
+  `}
 `;
 
 const Label = styled.label`
   font-weight: 500;
-  color: ${colors.gray300};
-  margin-bottom: 4px;
+  color: #374151;
+  margin-bottom: 5px;
+  font-size: ${typography.body2};
 `;
 
-const StyledInput = styled.input<{
-  $error: boolean;
-  $fullWidth: boolean;
-  $variant: string;
-}>`
-  display: block;
-  width: ${props => props.$fullWidth ? '100%' : 'auto'};
-  transition: all 0.2s ease-in-out;
+const InputWrapper = styled.div<{ $variant: string; $error: boolean; $disabled: boolean }>`
+  display: flex;
+  align-items: center;
+  width: 100%;
+  background-color: ${(props) => (props.$disabled ? colors.gray100 : 'transparent')};
+  ${({ $variant, $error, $disabled }) =>
+    $variant === 'outlined'
+      ? css`
+          border-radius: 5px;
+          border: ${$disabled ? 'none' : `1px solid ${$error ? colors.red200 : colors.gray300}`};
+          padding: 0px 10px;
+          height: 40px;
+
+          &:focus-within {
+            border-color: ${$error ? colors.red200 : colors.blue200};
+            box-shadow: 0 0 0 3px ${$error ? colors.red100 : colors.blue100};
+          }
+        `
+      : css`
+          border: none;
+          border-bottom: 1px solid ${$error ? colors.red200 : colors.gray300};
+          border-radius: 0;
+          padding: 5px 10px;
+          height: 32px;
+
+          &:focus-within {
+            border-bottom-color: ${$error ? colors.red200 : colors.blue200};
+          }
+        `}
+`;
+
+const StyledInput = styled.input<{ $error: boolean }>`
+  flex: 1;
+  border: none;
   outline: none;
-  background-color: ${colors.white};
+  background-color: transparent;
   font-size: 14px;
 
   &::placeholder {
-    color: ${colors.gray200};
+    color: #9ca3af;
+    font-size: ${typography.body6};
   }
 
   &:disabled {
-    background-color: ${colors.gray100};
+    color: ${colors.gray300};
     cursor: not-allowed;
+    font-size: 12px;
   }
+`;
 
-  ${({ $variant, $error }) => $variant === 'outlined' ? css`
-    border-radius: 20px;
-    border: 2px solid ${$error ? colors.red300 : colors.gray200};
-    padding: 8px 16px;
-    height: 32px;
-
-    &:focus {
-      border-color: ${$error ? colors.red300 : colors.blue200};
-      box-shadow: 0 0 0 3px ${$error ? 'rgba(239, 68, 68, 0.1)' : 'rgba(79, 70, 229, 0.1)'};
-    }
-  ` : css`
-    border: none;
-    border-bottom: 2px solid ${$error ? colors.red300 : colors.gray200};
-    border-radius: 0;
-    padding: 4px 0;
-    height: 24px;
-
-    &:focus {
-      border-bottom-color: ${$error ? colors.red300 : colors.blue200};
-    }
-  `}
+const SuffixContainer = styled.div<{ $variant: string; $error: boolean }>`
+  margin-left: 8px;
+  margin-bottom: 10px;
+  ${({ $variant, $error }) => $variant === 'outlined'
+    ? css`
+        border-radius: 20px;
+        border: 2px solid ${$error ? colors.red300 : colors.gray200};
+        padding: 8px 16px;
+        height: 32px;
+
+        &:focus {
+          border-color: ${$error ? colors.red300 : colors.blue200};
+          box-shadow: 0 0 0 3px ${$error ? 'rgba(239, 68, 68, 0.1)' : 'rgba(79, 70, 229, 0.1)'};
+        }
+      `
+    : css`
+        border: none;
+        border-bottom: 2px solid ${$error ? colors.red300 : colors.gray200};
+        border-radius: 0;
+        padding: 4px 0;
+        height: 24px;
+
+        &:focus {
+          border-bottom-color: ${$error ? colors.red300 : colors.blue200};
+        }
+      `}
 `;
 
 const Message = styled.p<{ $error?: boolean }>`
-  font-size: 14px;
+  font-size: ${typography.body6};
   margin-top: 4px;
-  color: ${props => props.$error ? colors.red300 : colors.gray200};
-  animation: ${fadeIn} 0.2s ease-in-out;
+  color: ${(props) => (props.$error ? colors.red300 : '#6b7280')};
+  animation: ${fadeIn} 0.3s ease-in-out; /* 애니메이션 시간 증가 */
 `;
 
 export function CustomInput({
@@ -107,23 +155,19 @@ export function CustomInput({
   fullWidth = false,
   disabled = false,
   variant = 'outlined',
+  suffix,
+  hasButton = false,
   ...props
 }: CustomInputProps) {
   return (
-    <Container $fullWidth={fullWidth}>
+    <Container $fullWidth={fullWidth} $hasButton={hasButton}>
       {label && <Label>{label}</Label>}
-      <StyledInput
-        $error={!!error}
-        $fullWidth={fullWidth}
-        $variant={variant}
-        disabled={disabled}
-        {...props}
-      />
-      {(error || hint) && (
-        <Message $error={!!error}>
-          {error || hint}
-        </Message>
-      )}
+      <InputWrapper $variant={variant} $error={!!error} $disabled={disabled}>
+        <StyledInput $error={!!error} disabled={disabled} {...props} />
+        {suffix && <SuffixContainer $variant={variant} $error={!!error}>{suffix}</SuffixContainer>}
+      </InputWrapper>
+      {(error || hint) && <Message $error={!!error}>{error || hint}</Message>}
     </Container>
   );
-}
+};
+