diff --git a/components/ActivityDetails/ActivityDetails.tsx b/components/ActivityDetails/ActivityDetails.tsx
index 29e75ef..dcbef29 100644
--- a/components/ActivityDetails/ActivityDetails.tsx
+++ b/components/ActivityDetails/ActivityDetails.tsx
@@ -28,6 +28,7 @@ import { usePopup } from '@/hooks/usePopup';
 import { darkModeState } from '@/states/themeState';
 import SendChat from '../Chat/SendChat';
 import { ShareButton } from '../ShareButton/ShareButton';
+import { loginState } from '@/states/loginState';
 import { ViewedActivitiesState } from '@/states/ViewedState';
 import { ViewedActivityProps } from '../ViewedActivities/ViewedActivities.type';
 
@@ -35,6 +36,7 @@ export default function ActivityDetails({ id }: ActivityDetailsProps) {
   const router = useRouter();
   const [isOpen, setIsOpen] = useState(false);
   const isDarkMode = useRecoilValue(darkModeState);
+  const isLogined = useRecoilValue(loginState);
   const [currentPage, setCurrentPage] = useState<number>(
     router.query.page ? parseInt(router.query.page as string, 10) : 1
   );
@@ -203,12 +205,14 @@ export default function ActivityDetails({ id }: ActivityDetailsProps) {
               </div>
             </div>
           </div>
-          <div className="flex items-center t:items-center m:items-end">
+          <div className="flex items-center t:items-center m:items-center">
             <div className="flex gap-[12px]">
-              {!isAuthor && (
+              {isLogined && !isAuthor && (
                 <SendChat
                   receiver={Number(activityData?.userId)}
                   activityId={Number(activityData?.id)}
+                  activityTitle={String(activityData?.title)}
+                  activityImage={String(activityData?.bannerImageUrl)}
                 />
               )}
               <ShareButton
diff --git a/components/Chat/SendChat.tsx b/components/Chat/SendChat.tsx
index e650447..18346da 100644
--- a/components/Chat/SendChat.tsx
+++ b/components/Chat/SendChat.tsx
@@ -7,7 +7,12 @@ import { useState } from 'react';
 import ChatPopup from '../Popup/ChatPopup';
 import { SendChatProps } from './SendChat.types';
 
-function SendChat({ receiver, activityId }: SendChatProps) {
+function SendChat({
+  receiver,
+  activityId,
+  activityTitle,
+  activityImage,
+}: SendChatProps) {
   const isDarkMode = useRecoilValue(darkModeState);
   const { userData } = useUserData();
   const [isPopupOpen, setIsPopupOpen] = useState(false);
@@ -41,25 +46,21 @@ function SendChat({ receiver, activityId }: SendChatProps) {
 
   return (
     <>
-      <button type="button" onClick={handleClick}>
-        {isDarkMode ? (
-          <Image
-            src="/icon/live_help_gray.svg"
-            alt="채팅 아이콘"
-            width={34}
-            height={34}
-          />
-        ) : (
-          <Image
-            src="/icon/live_help.svg"
-            alt="채팅 아이콘"
-            width={34}
-            height={34}
-          />
-        )}
+      <button type="button" onClick={handleClick} className="w-[34px] h-[34px]">
+        <Image
+          src={isDarkMode ? '/icon/live_help_gray.svg' : '/icon/live_help.svg'}
+          alt="채팅 아이콘"
+          width={34}
+          height={34}
+        />
       </button>
       {isPopupOpen && (
-        <ChatPopup closePopup={closePopup} activityId={activityId} />
+        <ChatPopup
+          closePopup={closePopup}
+          activityId={activityId}
+          activityTitle={activityTitle}
+          activityImage={activityImage}
+        />
       )}
     </>
   );
diff --git a/components/Chat/SendChat.types.ts b/components/Chat/SendChat.types.ts
index e67e308..9db2d2a 100644
--- a/components/Chat/SendChat.types.ts
+++ b/components/Chat/SendChat.types.ts
@@ -1,4 +1,6 @@
 export interface SendChatProps {
   receiver: number;
   activityId: number;
+  activityTitle: string;
+  activityImage: string;
 }
diff --git a/components/MyActivity/Card/Card.tsx b/components/MyActivity/Card/Card.tsx
index 1f2af02..3cdabef 100644
--- a/components/MyActivity/Card/Card.tsx
+++ b/components/MyActivity/Card/Card.tsx
@@ -12,6 +12,8 @@ import Link from 'next/link';
 import ChatPopup from '@/components/Popup/ChatPopup';
 import { useUserData } from '@/hooks/useUserData';
 import socket from '@/server/server';
+import { useRecoilValue } from 'recoil';
+import { darkModeState } from '@/states/themeState';
 
 function PopoverButton({ children, onClick }: PopoverButtonProps) {
   return (
@@ -69,7 +71,7 @@ function Card({
 }: CardProps) {
   const [isPopoverOpen, setIsPopoverOpen] = useState(false);
   const [isPopupOpen, setIsPopupOpen] = useState(false);
-  const { userData } = useUserData();
+  const isDarkMode = useRecoilValue(darkModeState);
 
   const handleClickMeatball = () => {
     setIsPopoverOpen(!isPopoverOpen);
@@ -132,7 +134,11 @@ function Card({
           <div className="m:w-[32px] m:h-[32px] flex items-center">
             <button onClick={handleClickChat}>
               <Image
-                src="/icon/chat_bubble.svg"
+                src={
+                  isDarkMode
+                    ? '/icon/chat_bubble_gray.svg'
+                    : '/icon/chat_bubble.svg'
+                }
                 alt="문의 내역"
                 width={30}
                 height={30}
@@ -144,6 +150,8 @@ function Card({
             <ChatPopup
               closePopup={closePopup}
               activityId={activityId}
+              activityTitle={title}
+              activityImage={activityImage}
               isAdmin
             />
           )}
diff --git a/components/Popup/ChatPopup.tsx b/components/Popup/ChatPopup.tsx
index 5ebea67..9ed5402 100644
--- a/components/Popup/ChatPopup.tsx
+++ b/components/Popup/ChatPopup.tsx
@@ -1,5 +1,4 @@
 import { useState, useEffect } from 'react';
-import { CloseButtonBold } from '../Button/Button';
 import {
   ChatListProps,
   ChatPopupProps,
@@ -13,11 +12,23 @@ import Image from 'next/image';
 function ChatPopup({
   closePopup,
   activityId,
+  activityTitle,
+  activityImage,
   isAdmin = false,
 }: ChatPopupProps) {
   const [message, setMessage] = useState('');
   const [senderId, setSenderId] = useState(0);
+  const [nickname, setNickName] = useState('문의 하기');
+  const [profile, setProfile] = useState(activityImage);
   const [isSendEnabled, setIsSendEnabled] = useState(true);
+  const [isEnter, setIsEnter] = useState(false);
+
+  const handleClickPrev = () => {
+    setIsEnter(false);
+    setIsSendEnabled(false);
+    setNickName('문의 내역');
+    setProfile(activityImage);
+  };
 
   const sendMessage = (event: any) => {
     event.preventDefault();
@@ -43,15 +54,50 @@ function ChatPopup({
 
   useEffect(() => {
     setIsSendEnabled(!isAdmin);
+    if (isAdmin) {
+      setNickName('문의 내역');
+    }
   }, []);
 
   return (
-    <div className="flex items-center justify-center fixed w-[400px] bottom-[30px] right-[30px] z-50">
-      <div className="flex flex-col bg-var-gray2 w-full rounded-[20px]">
-        <div className="flex justify-between pt-[7px] pb-[3px] px-[20px] items-center bg-var-gray3 rounded-t-[20px]">
-          <p>문의 채팅</p>
+    <div className="flex items-center justify-center fixed w-[400px] bottom-[30px] right-[30px] z-50 m:inset-0 m:w-full m:bg-black m:bg-opacity-70">
+      <div className="flex flex-col bg-var-gray2 w-full rounded-[20px] dark:bg-var-dark2 dark:border-4 dark:border-solid dark:border-var-dark3">
+        <div className="flex justify-between h-[64px] pt-[10px] pb-[3px] px-[20px] items-center bg-var-gray3 rounded-t-[15px] dark:bg-var-dark3">
+          <div className="flex gap-[10px]">
+            <div className="w-[40px] h-[40px] rounded-full">
+              <Image
+                src={profile}
+                alt="프로필"
+                width={40}
+                height={40}
+                className="w-[40px] h-[40px] rounded-full"
+              />
+            </div>
+            <div>
+              <p className="font-[500] line-clamp-1">{activityTitle}</p>
+              <p className="text-var-gray6">{`@${nickname}`}</p>
+            </div>
+          </div>
+
           <div className="flex items-center h-[30px]">
-            <CloseButtonBold onClick={closePopup} />
+            {isEnter && (
+              <button onClick={handleClickPrev}>
+                <Image
+                  src="/icon/prev_arrow.svg"
+                  alt="이전"
+                  width={20}
+                  height={20}
+                />
+              </button>
+            )}
+            <button onClick={closePopup}>
+              <Image
+                src="/icon/chat_close.svg"
+                alt="닫기"
+                width={24}
+                height={24}
+              />
+            </button>
           </div>
         </div>
         <div className="flex flex-col h-[500px]">
@@ -60,6 +106,10 @@ function ChatPopup({
               activityId={activityId}
               handleSenderId={setSenderId}
               handleSendEnable={setIsSendEnabled}
+              isEnter={isEnter}
+              handleIsEnter={setIsEnter}
+              handleNickName={setNickName}
+              handleProfile={setProfile}
             />
           ) : (
             <ShowChatList />
@@ -91,18 +141,23 @@ function ShowChatRoomList({
   activityId,
   handleSenderId,
   handleSendEnable,
+  isEnter,
+  handleIsEnter,
+  handleNickName,
+  handleProfile,
 }: ChatRoomPopupProps) {
   const [rooms, setRooms] = useState<ChatRoomProps[]>([]);
-  const [isEnter, setIsEnter] = useState(false);
   const { userData } = useUserData();
 
-  const handleClickRoom = (userId: number) => {
+  const handleClickRoom = (userId: number, index: number) => {
     socket.emit('inquiryAdmin', userData.id, activityId, userId, (res: any) => {
       console.log('inquiryAdmin res', res);
     });
-    setIsEnter(true);
+    handleIsEnter(true);
     handleSenderId(userId);
     handleSendEnable(true);
+    handleNickName(rooms[index].user.name);
+    handleProfile(rooms[index].user.profile);
   };
 
   useEffect(() => {
@@ -129,8 +184,8 @@ function ShowChatRoomList({
               <div key={room.user.id} className="flex justify-center">
                 <button
                   type="button"
-                  onClick={() => handleClickRoom(room.user.id)}
-                  className={`flex items-center gap-[15px] p-[15px] h-[75px] bg-var-gray2 w-full max-w-[400px] border-b border-solid border-b-var-gray4`}
+                  onClick={() => handleClickRoom(room.user.id, index)}
+                  className={`flex items-center gap-[15px] p-[15px] h-[75px] bg-var-gray2 w-full max-w-[400px] border-b border-solid border-b-var-gray4 dark:bg-var-dark2`}
                 >
                   <div className="w-[50px] h-[50px] rounded-full overflow-hidden">
                     <Image
@@ -141,7 +196,7 @@ function ShowChatRoomList({
                     />
                   </div>
                   <div className="flex flex-col items-start">
-                    <div className="font-[500] text-nomad-black">
+                    <div className="font-[500] text-nomad-black dark:text-var-gray2">
                       {room.user.name}
                     </div>
                     <div className="text-var-gray6">
@@ -153,7 +208,7 @@ function ShowChatRoomList({
             ))}
           </div>
         ) : (
-          <div className="flex justify-center items-center">
+          <div className="flex justify-center items-center mt-[20px]">
             <p>아직 문의 채팅이 없습니다.</p>
           </div>
         ))}
@@ -200,7 +255,7 @@ function ShowChatList({ isAdmin = false }: ChatListProps) {
               className={`inline-block max-w-max rounded-[10px] p-[8px] pl-[10px] ${
                 sender[index] === 'user'
                   ? 'bg-var-green2 text-white'
-                  : 'bg-var-gray3'
+                  : 'bg-var-gray3 text-var-dark1'
               }`}
             >
               {message}
diff --git a/components/Popup/ChatPopup.types.tsx b/components/Popup/ChatPopup.types.tsx
index f28c74e..c14c0ec 100644
--- a/components/Popup/ChatPopup.types.tsx
+++ b/components/Popup/ChatPopup.types.tsx
@@ -3,6 +3,8 @@ import { Dispatch, SetStateAction } from 'react';
 export interface ChatPopupProps {
   closePopup: () => void;
   activityId: number;
+  activityTitle: string;
+  activityImage: string;
   isAdmin?: boolean;
 }
 
@@ -21,6 +23,10 @@ export interface ChatRoomPopupProps {
   activityId: number;
   handleSenderId: Dispatch<SetStateAction<number>>;
   handleSendEnable: Dispatch<SetStateAction<boolean>>;
+  isEnter: boolean;
+  handleIsEnter: Dispatch<SetStateAction<boolean>>;
+  handleNickName: Dispatch<SetStateAction<string>>;
+  handleProfile: Dispatch<SetStateAction<string>>;
 }
 
 export interface ChatListProps {
diff --git a/public/icon/chat_close.svg b/public/icon/chat_close.svg
new file mode 100644
index 0000000..751b33f
--- /dev/null
+++ b/public/icon/chat_close.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px" fill="#999999"><path d="m256-200-56-56 224-224-224-224 56-56 224 224 224-224 56 56-224 224 224 224-56 56-224-224-224 224Z"/></svg>
\ No newline at end of file
diff --git a/public/icon/prev_arrow.svg b/public/icon/prev_arrow.svg
new file mode 100644
index 0000000..b117403
--- /dev/null
+++ b/public/icon/prev_arrow.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px" fill="#999999"><path d="M400-80 0-480l400-400 71 71-329 329 329 329-71 71Z"/></svg>
\ No newline at end of file
diff --git a/server/server.js b/server/server.js
index 3b2cbc3..9497359 100644
--- a/server/server.js
+++ b/server/server.js
@@ -1,4 +1,5 @@
 import io from 'socket.io-client';
 const socket = io('https://rear-ninnetta-codeitsprinter-6a0e09e4.koyeb.app/');
+// const socket = io('http://localhost:5001');
 
 export default socket;