diff --git a/packages/cdk/lambda/deleteChat.ts b/packages/cdk/lambda/deleteChat.ts
new file mode 100644
index 00000000..fd8a7a14
--- /dev/null
+++ b/packages/cdk/lambda/deleteChat.ts
@@ -0,0 +1,32 @@
+import { APIGatewayProxyEvent, APIGatewayProxyResult } from 'aws-lambda';
+import { deleteChat } from './repository';
+
+export const handler = async (
+  event: APIGatewayProxyEvent
+): Promise<APIGatewayProxyResult> => {
+  try {
+    const userId: string =
+      event.requestContext.authorizer!.claims['cognito:username'];
+    const chatId = event.pathParameters!.chatId!;
+    await deleteChat(userId, chatId);
+
+    return {
+      statusCode: 204,
+      headers: {
+        'Content-Type': 'application/json',
+        'Access-Control-Allow-Origin': '*',
+      },
+      body: '',
+    };
+  } catch (error) {
+    console.log(error);
+    return {
+      statusCode: 500,
+      headers: {
+        'Content-Type': 'application/json',
+        'Access-Control-Allow-Origin': '*',
+      },
+      body: JSON.stringify({ message: 'Internal Server Error' }),
+    };
+  }
+};
diff --git a/packages/cdk/lambda/repository.ts b/packages/cdk/lambda/repository.ts
index e5b025c7..e24df091 100644
--- a/packages/cdk/lambda/repository.ts
+++ b/packages/cdk/lambda/repository.ts
@@ -7,6 +7,7 @@ import * as crypto from 'crypto';
 import { DynamoDBClient } from '@aws-sdk/client-dynamodb';
 import {
   BatchWriteCommand,
+  DeleteCommand,
   DynamoDBDocumentClient,
   PutCommand,
   QueryCommand,
@@ -195,3 +196,39 @@ export const updateFeedback = async (
 
   return res.Attributes as RecordedMessage;
 };
+
+export const deleteChat = async (
+  _userId: string,
+  _chatId: string
+): Promise<void> => {
+  // Chat の削除
+  const chatItem = await findChatById(_userId, _chatId);
+  await dynamoDbDocument.send(
+    new DeleteCommand({
+      TableName: TABLE_NAME,
+      Key: {
+        id: chatItem?.id,
+        createdDate: chatItem?.createdDate,
+      },
+    })
+  );
+
+  // // Message の削除
+  const messageItems = await listMessages(_chatId);
+  await dynamoDbDocument.send(
+    new BatchWriteCommand({
+      RequestItems: {
+        [TABLE_NAME]: messageItems.map((m) => {
+          return {
+            DeleteRequest: {
+              Key: {
+                id: m.id,
+                createdDate: m.createdDate,
+              },
+            },
+          };
+        }),
+      },
+    })
+  );
+};
diff --git a/packages/cdk/lib/construct/api.ts b/packages/cdk/lib/construct/api.ts
index 9cc03552..527ff0c3 100644
--- a/packages/cdk/lib/construct/api.ts
+++ b/packages/cdk/lib/construct/api.ts
@@ -83,6 +83,16 @@ export class Api extends Construct {
     });
     table.grantWriteData(createChatFunction);
 
+    const deleteChatFunction = new NodejsFunction(this, 'DeleteChat', {
+      runtime: Runtime.NODEJS_18_X,
+      entry: './lambda/deleteChat.ts',
+      timeout: Duration.minutes(15),
+      environment: {
+        TABLE_NAME: table.tableName,
+      },
+    });
+    table.grantReadWriteData(deleteChatFunction);
+
     const createMessagesFunction = new NodejsFunction(this, 'CreateMessages', {
       runtime: Runtime.NODEJS_18_X,
       entry: './lambda/createMessages.ts',
@@ -210,6 +220,13 @@ export class Api extends Construct {
       commonAuthorizerProps
     );
 
+    // DELETE: /chats/{chatId}
+    chatResource.addMethod(
+      'DELETE',
+      new LambdaIntegration(deleteChatFunction),
+      commonAuthorizerProps
+    );
+
     const messagesResource = chatResource.addResource('messages');
 
     // GET: /chats/{chatId}/messages
diff --git a/packages/web/src/components/ChatList.tsx b/packages/web/src/components/ChatList.tsx
index f296490d..2ef87893 100644
--- a/packages/web/src/components/ChatList.tsx
+++ b/packages/web/src/components/ChatList.tsx
@@ -1,37 +1,92 @@
-import React from 'react';
+import React, { useCallback, useState } from 'react';
 import { BaseProps } from '../@types/common';
 import useConversation from '../hooks/useConversation';
-import { PiChat } from 'react-icons/pi';
-import { Link, useParams } from 'react-router-dom';
+import { PiChat, PiTrash } from 'react-icons/pi';
+import { Link, useNavigate, useParams } from 'react-router-dom';
+import ButtonIcon from './ButtonIcon';
+import DialogConfirmDeleteChat from './DialogConfirmDeleteChat';
+import { Chat } from 'generative-ai-use-cases-jp';
 
 type Props = BaseProps;
 
 const ChatList: React.FC<Props> = (props) => {
-  const { conversations, loading } = useConversation();
+  const { conversations, loading, deleteConversation } = useConversation();
   const { chatId } = useParams();
+  const [openDialog, setOpenDialog] = useState(false);
+  const [targetDelete, setTargetDelete] = useState<Chat>();
+  const navigate = useNavigate();
+
+  const onDelete = useCallback(
+    (_chatId: string) => {
+      deleteConversation(_chatId).then(() => {
+        setOpenDialog(false);
+        navigate('/chat');
+      });
+    },
+    [deleteConversation, navigate]
+  );
 
   return (
-    <div className={`${props.className ?? ''} flex flex-col gap-1`}>
-      {loading &&
-        new Array(10)
-          .fill('')
-          .map((_, idx) => (
+    <>
+      <DialogConfirmDeleteChat
+        isOpen={openDialog}
+        target={targetDelete}
+        onDelete={onDelete}
+        onClose={() => {
+          setOpenDialog(false);
+        }}
+      />
+      <div
+        className={`${
+          props.className ?? ''
+        } flex flex-col items-start gap-1 overflow-x-hidden`}>
+        {loading &&
+          new Array(10)
+            .fill('')
+            .map((_, idx) => (
+              <div
+                key={idx}
+                className="bg-aws-sky/20 h-8 w-full animate-pulse rounded"></div>
+            ))}
+        {conversations.map((chat) => {
+          const _chatId = chat.chatId.split('#')[1];
+          return (
             <div
-              key={idx}
-              className="bg-aws-sky/20 h-8 w-full animate-pulse rounded"></div>
-          ))}
-      {conversations.map((chat) => (
-        <Link
-          key={chat.chatId}
-          className={`hover:bg-aws-sky flex h-8 items-center rounded p-2 
-          ${chatId === chat.chatId.split('#')[1] && 'bg-aws-sky'}
-           ${props.className}`}
-          to={`/chat/${chat.chatId.split('#')[1]}`}>
-          <PiChat className="mr-2 " />
-          <div className="truncate">{chat.title}</div>
-        </Link>
-      ))}
-    </div>
+              key={_chatId}
+              className={`hover:bg-aws-sky group flex w-full items-center rounded  ${
+                chatId === _chatId && 'bg-aws-sky'
+              }
+          ${props.className}`}>
+              <Link
+                className={`flex h-8 w-full items-center justify-start p-2`}
+                to={`/chat/${_chatId}`}>
+                <div className="mr-2 ">
+                  <PiChat />
+                </div>
+                <div className="relative max-h-5 flex-1 overflow-hidden text-ellipsis break-all">
+                  {chat.title}
+                  <div
+                    className={`group-hover:from-aws-sky group-hover:to-aws-sky/40 absolute inset-y-0 right-0 w-8 bg-gradient-to-l
+              ${chatId === _chatId ? 'from-aws-sky' : 'from-aws-squid-ink'}
+              `}></div>
+                </div>
+              </Link>
+              {chatId === _chatId && (
+                <div className="-ml-2 flex pr-2">
+                  <ButtonIcon
+                    onClick={() => {
+                      setOpenDialog(true);
+                      setTargetDelete(chat);
+                    }}>
+                    <PiTrash />
+                  </ButtonIcon>
+                </div>
+              )}
+            </div>
+          );
+        })}
+      </div>
+    </>
   );
 };
 
diff --git a/packages/web/src/components/DialogConfirmDeleteChat.tsx b/packages/web/src/components/DialogConfirmDeleteChat.tsx
new file mode 100644
index 00000000..e693854c
--- /dev/null
+++ b/packages/web/src/components/DialogConfirmDeleteChat.tsx
@@ -0,0 +1,39 @@
+import React from 'react';
+import { BaseProps } from '../@types/common';
+import Button from './Button';
+import ModalDialog from './ModalDialog';
+import { Chat } from 'generative-ai-use-cases-jp';
+
+type Props = BaseProps & {
+  isOpen: boolean;
+  target?: Chat;
+  onDelete: (chatId: string) => void;
+  onClose: () => void;
+};
+
+const DialogConfirmDeleteChat: React.FC<Props> = (props) => {
+  return (
+    <ModalDialog {...props} title="削除確認">
+      <div>
+        チャット
+        <span className="font-bold">「{props.target?.title}」</span>
+        を削除しますか？
+      </div>
+
+      <div className="mt-4 flex justify-end gap-2">
+        <Button outlined onClick={props.onClose} className="p-2">
+          Cancel
+        </Button>
+        <Button
+          onClick={() => {
+            props.onDelete(props.target?.chatId.split('#')[1] ?? '');
+          }}
+          className="bg-red-500 p-2 text-white">
+          削除
+        </Button>
+      </div>
+    </ModalDialog>
+  );
+};
+
+export default DialogConfirmDeleteChat;
diff --git a/packages/web/src/components/ModalDialog.tsx b/packages/web/src/components/ModalDialog.tsx
new file mode 100644
index 00000000..00f1c834
--- /dev/null
+++ b/packages/web/src/components/ModalDialog.tsx
@@ -0,0 +1,66 @@
+import { Dialog, Transition } from '@headlessui/react';
+import { Fragment, useCallback } from 'react';
+import { BaseProps } from '../@types/common';
+
+type Props = BaseProps & {
+  isOpen: boolean;
+  title: string;
+  children: React.ReactNode;
+  onClose?: () => void;
+};
+
+const ModalDialog: React.FC<Props> = (props) => {
+  const onClose = useCallback(() => {
+    if (props.onClose) {
+      props.onClose();
+    }
+  }, [props]);
+
+  return (
+    <>
+      <Transition appear show={props.isOpen} as={Fragment}>
+        <Dialog as="div" className="relative z-50" onClose={() => onClose()}>
+          <Transition.Child
+            as={Fragment}
+            enter="ease-out duration-300"
+            enterFrom="opacity-0"
+            enterTo="opacity-100"
+            leave="ease-in duration-200"
+            leaveFrom="opacity-100"
+            leaveTo="opacity-0">
+            <div className="fixed inset-0 bg-black/30" />
+          </Transition.Child>
+
+          <div className="fixed inset-0 overflow-y-auto">
+            <div className="flex min-h-full items-center justify-center p-4 text-center">
+              <Transition.Child
+                as={Fragment}
+                enter="ease-out duration-300"
+                enterFrom="opacity-0 scale-95"
+                enterTo="opacity-100 scale-100"
+                leave="ease-in duration-200"
+                leaveFrom="opacity-100 scale-100"
+                leaveTo="opacity-0 scale-95">
+                <Dialog.Panel className="w-full max-w-md overflow-hidden rounded-2xl bg-white p-6 text-left align-middle shadow-xl transition-all">
+                  <Dialog.Title
+                    as="h3"
+                    className="text-aws-font-color border-b pb-2 text-lg font-medium leading-6">
+                    {props.title}
+                  </Dialog.Title>
+
+                  <div className="mt-3">
+                    <div className="text-aws-font-color/70 text-sm">
+                      {props.children}
+                    </div>
+                  </div>
+                </Dialog.Panel>
+              </Transition.Child>
+            </div>
+          </div>
+        </Dialog>
+      </Transition>
+    </>
+  );
+};
+
+export default ModalDialog;
diff --git a/packages/web/src/hooks/useChatApi.ts b/packages/web/src/hooks/useChatApi.ts
index 03eb3cd4..42ef0355 100644
--- a/packages/web/src/hooks/useChatApi.ts
+++ b/packages/web/src/hooks/useChatApi.ts
@@ -37,6 +37,9 @@ const useChatApi = () => {
       const res = await http.post(`chats/${chatId}/messages`, req);
       return res.data;
     },
+    deleteChat: async (chatId: string) => {
+      return http.delete<void>(`chats/${chatId}`);
+    },
     listChats: () => {
       return http.get<ListChatsResponse>('chats');
     },
diff --git a/packages/web/src/hooks/useConversation.ts b/packages/web/src/hooks/useConversation.ts
index c099aed7..5fd9c76d 100644
--- a/packages/web/src/hooks/useConversation.ts
+++ b/packages/web/src/hooks/useConversation.ts
@@ -1,13 +1,19 @@
 import useChatApi from './useChatApi';
 
 const useConversation = () => {
-  const { listChats } = useChatApi();
+  const { listChats, deleteChat } = useChatApi();
   const { data, isLoading, mutate } = listChats();
+  const deleteConversation = (chatId: string) => {
+    return deleteChat(chatId).then(() => {
+      mutate();
+    });
+  };
 
   return {
     loading: isLoading,
     conversations: data ? data.chats : [],
     mutate,
+    deleteConversation,
   };
 };