diff --git a/next.config.ts b/next.config.ts
index 810a8dd..9d5b0f1 100644
--- a/next.config.ts
+++ b/next.config.ts
@@ -8,6 +8,14 @@ const nextConfig: NextConfig = {
       fullUrl: true,
     },
   },
+  images: {
+    remotePatterns: [
+      {
+        protocol: 'https',
+        hostname: 'images.unsplash.com',
+      },
+    ],
+  },
 };
 
 export default nextConfig;
diff --git a/src/components/ui/Avatar/Avatar.tsx b/src/components/ui/Avatar/Avatar.tsx
new file mode 100644
index 0000000..b7eea99
--- /dev/null
+++ b/src/components/ui/Avatar/Avatar.tsx
@@ -0,0 +1,70 @@
+'use client';
+
+import { DEFAULT_COLORS } from '@/constants/colors';
+import { cn, getColorByString } from '@/utils/helper';
+import { cva, VariantProps } from 'class-variance-authority';
+import Image from 'next/image';
+import { HTMLAttributes, useState } from 'react';
+
+/**
+ * 커스터마이징 가능한 기본 공용 Avatar 컴포넌트입니다.
+ *
+ * ### Variants:
+ * - `size`:
+ *   - `default`: width:38px, font-size:16px;
+ *   - `md`: width:34px, font-size:16px;
+ *   - `sm`: width:24px, font-size:12px;
+ *
+ * ### Default Variants (기본 스타일):
+ * - `size`: `default`
+ *
+ *
+ * @example
+ * <Avatar size="md" email="test@test.com" />
+ *
+ * 반응형으로 쓰고 싶을땐, classname을 추가하세요
+ * <Avatar email="test@test.com" className='w-8 md:w-10 lg:w-12' />
+ */
+
+const avatarVariants = cva(
+  //prettier-ignore
+  'relative inline-flex items-center justify-center aspect-square rounded-full overflow-hidden border-2 border-white leading-none',
+  {
+    variants: {
+      size: {
+        default: 'w-[38px] text-lg',
+        md: 'w-[34px] text-lg',
+        sm: 'w-6 text-xs',
+      },
+    },
+
+    defaultVariants: {
+      size: 'default',
+    },
+  },
+);
+
+interface AvatarProps extends HTMLAttributes<HTMLDivElement>, VariantProps<typeof avatarVariants> {
+  email: string;
+  profileImageUrl?: string;
+}
+
+export default function Avatar({ email, profileImageUrl, size, className, ...props }: AvatarProps) {
+  const [imgError, setImgError] = useState(false);
+  const colorCode = getColorByString(email, DEFAULT_COLORS);
+  const firstChar = email.charAt(0);
+
+  const isFallback = !profileImageUrl || imgError;
+
+  return (
+    <figure className={cn(avatarVariants({ size, className }))} {...props}>
+      {!isFallback ? (
+        <Image src={profileImageUrl} alt={email} fill onError={() => setImgError(true)} />
+      ) : (
+        <span className='flex aspect-square w-full items-center justify-center font-semibold uppercase text-white' style={{ backgroundColor: colorCode }}>
+          {firstChar}
+        </span>
+      )}
+    </figure>
+  );
+}
diff --git a/src/components/ui/Avatar/StackAvatars.tsx b/src/components/ui/Avatar/StackAvatars.tsx
new file mode 100644
index 0000000..df31494
--- /dev/null
+++ b/src/components/ui/Avatar/StackAvatars.tsx
@@ -0,0 +1,26 @@
+import Avatar from './Avatar';
+
+interface StackAvatarsProps {
+  members: { email: string; profileImageUrl?: string }[];
+  visibleCount: number;
+}
+
+export default function StackAvatars({ members, visibleCount = 3 }: StackAvatarsProps) {
+  const chunkedMembers = members.slice(0, visibleCount);
+  const restMembersCount = members.length - visibleCount;
+
+  return (
+    <ul className='flex pl-2 leading-none'>
+      {chunkedMembers.map((member) => (
+        <li key={member.email} className='-ml-2'>
+          <Avatar email={member.email} profileImageUrl={member.profileImageUrl} />
+        </li>
+      ))}
+      {restMembersCount > 0 && (
+        <li className='-ml-2'>
+          <span className='relative flex aspect-square h-full items-center justify-center rounded-full border-2 border-white bg-[#F4D7DA] font-medium text-[#D25B68]'>+{restMembersCount}</span>
+        </li>
+      )}
+    </ul>
+  );
+}
diff --git a/src/constants/colors.ts b/src/constants/colors.ts
new file mode 100644
index 0000000..7abcc32
--- /dev/null
+++ b/src/constants/colors.ts
@@ -0,0 +1,3 @@
+type HexColor = `#${string}`;
+
+export const DEFAULT_COLORS: HexColor[] = ['#7AC555', '#760DDE', '#FFA500', '#76A5EA', '#E876EA'];
diff --git a/src/utils/helper.ts b/src/utils/helper.ts
index 2819a83..b4de34b 100644
--- a/src/utils/helper.ts
+++ b/src/utils/helper.ts
@@ -4,3 +4,9 @@ import { twMerge } from 'tailwind-merge';
 export function cn(...inputs: ClassValue[]) {
   return twMerge(clsx(inputs));
 }
+
+export function getColorByString(value: string, colorArray: string[]) {
+  const charCode = value.toLowerCase().charCodeAt(0);
+  const index = charCode % colorArray.length;
+  return colorArray[index];
+}