diff --git a/src/app/(withAuth)/courses/[courseId]/lectures/[lectureId]/problems/[problemId]/ProblmBody.tsx b/src/app/(withAuth)/courses/[courseId]/lectures/[lectureId]/problems/[problemId]/ProblmBody.tsx
index 0c89f271..2f241f5b 100644
--- a/src/app/(withAuth)/courses/[courseId]/lectures/[lectureId]/problems/[problemId]/ProblmBody.tsx
+++ b/src/app/(withAuth)/courses/[courseId]/lectures/[lectureId]/problems/[problemId]/ProblmBody.tsx
@@ -1,9 +1,7 @@
 import type { ProblemSession } from '@prisma/client';
 import { useRouter } from 'next/navigation';
 import { useEffect, useRef, useState } from 'react';
-import { MdOutlineInfo } from 'react-icons/md';
 
-import { CustomModal } from '../../../../../../../../components/molecules/CustomModal';
 import {
   AlertDialog,
   AlertDialogBody,
@@ -16,7 +14,6 @@ import {
   Card,
   Heading,
   HStack,
-  Icon,
   Tooltip,
   useDisclosure,
   VStack,
@@ -46,7 +43,6 @@ export const ProblemBody: React.FC<Props> = (props) => {
     problemType === 'executionResult' ? props.problem.traceItems.length - 1 : props.problemSession.traceItemIndex;
   const previousTraceItemIndex = problemType === 'executionResult' ? 0 : currentTraceItemIndex - 1;
 
-  const { isOpen: isHelpModalOpen, onClose: onHelpModalClose, onOpen: onHelpModalOpen } = useDisclosure();
   const { isOpen: isAlertOpen, onClose: onAlertClose, onOpen: onAlertOpen } = useDisclosure();
   const cancelRef = useRef(null);
 
@@ -136,18 +132,6 @@ export const ProblemBody: React.FC<Props> = (props) => {
               </Box>
               の盤面を作成してください。
             </div>
-
-            <HStack spacing={4}>
-              <Button leftIcon={<Icon as={MdOutlineInfo} />} size="sm" variant="outline" onClick={onHelpModalOpen}>
-                解答方法
-              </Button>
-              <CustomModal
-                body={`${problemType === 'executionResult' ? '実行結果問題' : 'ステップ問題'}の解答方法の説明`}
-                isOpen={isHelpModalOpen}
-                title={`${problemType === 'executionResult' ? '実行結果問題' : 'ステップ問題'}について`}
-                onClose={onHelpModalClose}
-              />
-            </HStack>
           </VStack>
 
           <SyntaxHighlighter
diff --git a/src/components/molecules/CustomModal.tsx b/src/components/molecules/CustomModal.tsx
deleted file mode 100644
index ff831937..00000000
--- a/src/components/molecules/CustomModal.tsx
+++ /dev/null
@@ -1,37 +0,0 @@
-import {
-  Button,
-  Modal,
-  ModalBody,
-  ModalCloseButton,
-  ModalContent,
-  ModalFooter,
-  ModalHeader,
-  ModalOverlay,
-} from '../../infrastructures/useClient/chakra';
-
-interface CustomModalProps {
-  title: string;
-  body: string;
-  isOpen: boolean;
-  onClose: () => void;
-}
-
-export const CustomModal: React.FC<CustomModalProps> = ({ body, isOpen, onClose, title }) => {
-  return (
-    <>
-      <Modal isOpen={isOpen} onClose={onClose}>
-        <ModalOverlay />
-        <ModalContent>
-          <ModalHeader>{title}</ModalHeader>
-          <ModalCloseButton />
-          <ModalBody>{body}</ModalBody>
-          <ModalFooter>
-            <Button colorScheme="brand" onClick={onClose}>
-              閉じる
-            </Button>
-          </ModalFooter>
-        </ModalContent>
-      </Modal>
-    </>
-  );
-};