diff --git a/app/src/main/res/layout/activity_chat_room.xml b/app/src/main/res/layout/activity_chat_room.xml
index 13544084..5e844b0c 100644
--- a/app/src/main/res/layout/activity_chat_room.xml
+++ b/app/src/main/res/layout/activity_chat_room.xml
@@ -1,6 +1,216 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:background="@color/color_131313">
+
+    <!-- 배경 프로필 이미지 -->
+    <ImageView
+        android:id="@+id/iv_background_profile"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:scaleType="centerCrop"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        android:contentDescription="프로필 배경 이미지" />
+
+    <!-- 딤 처리 (activity_character_detail.xml의 view_character_dim 스타일 참조) -->
+    <View
+        android:id="@+id/view_character_dim"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:background="@color/color_99000000"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent" />
+
+    <!-- 상태바 영역 배경 -->
+    <View
+        android:id="@+id/status_bar_background"
+        android:layout_width="0dp"
+        android:layout_height="24dp"
+        android:background="@android:color/transparent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent" />
+
+    <!-- 헤더 영역 -->
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:id="@+id/header_container"
+        android:layout_width="0dp"
+        android:layout_height="56dp"
+        android:paddingStart="16dp"
+        android:paddingEnd="16dp"
+        android:paddingTop="8dp"
+        android:paddingBottom="8dp"
+        android:background="@android:color/transparent"
+        app:layout_constraintTop_toBottomOf="@id/status_bar_background"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent">
+
+        <ImageView
+            android:id="@+id/iv_back"
+            android:layout_width="24dp"
+            android:layout_height="24dp"
+            android:src="@drawable/ic_back"
+            android:contentDescription="뒤로가기"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintBottom_toBottomOf="parent" />
+
+        <ImageView
+            android:id="@+id/iv_profile"
+            android:layout_width="36dp"
+            android:layout_height="36dp"
+            android:layout_marginStart="12dp"
+            android:src="@drawable/ic_placeholder_profile"
+            android:contentDescription="프로필 이미지"
+            app:layout_constraintStart_toEndOf="@id/iv_back"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintBottom_toBottomOf="parent" />
+
+        <TextView
+            android:id="@+id/tv_name"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="12dp"
+            android:text="Character Name"
+            android:textColor="#FFFFFFFF"
+            android:textSize="16sp"
+            android:maxLines="1"
+            android:ellipsize="end"
+            app:layout_constraintStart_toEndOf="@id/iv_profile"
+            app:layout_constraintTop_toTopOf="@id/iv_profile"
+            app:layout_constraintEnd_toStartOf="@id/tv_character_type_badge" />
+
+        <TextView
+            android:id="@+id/tv_character_type_badge"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="8dp"
+            android:paddingStart="8dp"
+            android:paddingEnd="8dp"
+            android:paddingTop="4dp"
+            android:paddingBottom="4dp"
+            android:text="Clone"
+            android:textColor="#FFFFFFFF"
+            android:textSize="12sp"
+            android:background="@drawable/bg_character_status_clone"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintBottom_toBottomOf="@id/iv_profile" />
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
+    <!-- 안내 메시지 영역 -->
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:id="@+id/notice_container"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="16dp"
+        android:layout_marginEnd="16dp"
+        android:layout_marginTop="8dp"
+        android:padding="12dp"
+        android:background="@drawable/bg_chat_notice"
+        app:layout_constraintTop_toBottomOf="@id/header_container"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent">
+
+        <ImageView
+            android:id="@+id/iv_notice_icon"
+            android:layout_width="20dp"
+            android:layout_height="20dp"
+            android:src="@android:drawable/ic_dialog_info"
+            app:tint="#FFFFFFFF"
+            android:contentDescription="안내"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintBottom_toBottomOf="parent" />
+
+        <TextView
+            android:id="@+id/tv_notice_message"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="8dp"
+            android:layout_marginEnd="8dp"
+            android:textColor="#FFFFFFFF"
+            android:textSize="12sp"
+            android:text="AI Clone은 크리에이터의 정보를 기반으로 대화하지만, 모든 정보를 완벽하게 반영하거나 실제 대화와 일치하지 않을 수 있습니다."
+            app:layout_constraintStart_toEndOf="@id/iv_notice_icon"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toStartOf="@id/iv_collapse" />
+
+        <ImageView
+            android:id="@+id/iv_collapse"
+            android:layout_width="20dp"
+            android:layout_height="20dp"
+            android:src="@android:drawable/arrow_up_float"
+            app:tint="#FFFFFFFF"
+            android:contentDescription="접기"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintBottom_toBottomOf="parent" />
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
+    <!-- 채팅 메시지 영역 -->
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/rv_messages"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:paddingStart="12dp"
+        android:paddingEnd="12dp"
+        android:clipToPadding="false"
+        app:layout_constraintTop_toBottomOf="@id/notice_container"
+        app:layout_constraintBottom_toTopOf="@id/input_container"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent" />
+
+    <!-- 입력 영역 -->
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:id="@+id/input_container"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:padding="12dp"
+        android:background="@android:color/transparent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent">
+
+        <EditText
+            android:id="@+id/et_message"
+            android:layout_width="0dp"
+            android:layout_height="48dp"
+            android:layout_marginEnd="8dp"
+            android:paddingStart="16dp"
+            android:paddingEnd="16dp"
+            android:hint="메세지를 입력하세요."
+            android:maxLength="200"
+            android:maxLines="4"
+            android:background="@drawable/bg_chat_input"
+            android:textColor="#FFFFFFFF"
+            android:textColorHint="#80FFFFFF"
+            android:inputType="textMultiLine"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintEnd_toStartOf="@id/iv_send"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintBottom_toBottomOf="parent" />
+
+        <ImageView
+            android:id="@+id/iv_send"
+            android:layout_width="48dp"
+            android:layout_height="48dp"
+            android:src="@drawable/ic_message_send"
+            android:contentDescription="전송"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintBottom_toBottomOf="parent" />
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
 
 </androidx.constraintlayout.widget.ConstraintLayout>