diff --git a/frontend/src/pages/ClubDetailPage/ClubDetailPage.tsx b/frontend/src/pages/ClubDetailPage/ClubDetailPage.tsx
index 3deddc210..192dc08f1 100644
--- a/frontend/src/pages/ClubDetailPage/ClubDetailPage.tsx
+++ b/frontend/src/pages/ClubDetailPage/ClubDetailPage.tsx
@@ -11,6 +11,7 @@ import ClubFeed from '@/pages/ClubDetailPage/components/ClubFeed/ClubFeed';
 import ClubIntroContent from '@/pages/ClubDetailPage/components/ClubIntroContent/ClubIntroContent';
 import ClubProfileCard from '@/pages/ClubDetailPage/components/ClubProfileCard/ClubProfileCard';
 import * as Styled from './ClubDetailPage.styles';
+import ClubDetailFooter from './components/ClubDetailFooter/ClubDetailFooter';
 
 const ClubDetailPage = () => {
   const [activeTab, setActiveTab] = useState<'intro' | 'photos'>('intro');
@@ -79,6 +80,10 @@ const ClubDetailPage = () => {
         </Styled.ContentWrapper>
       </Styled.Container>
       <Footer />
+      <ClubDetailFooter
+        recruitmentStart={clubDetail.recruitmentStart}
+        recruitmentEnd={clubDetail.recruitmentEnd}
+      />
     </>
   );
 };
diff --git a/frontend/src/pages/ClubDetailPage/components/ClubApplyButton/ClubApplyButton.styles.ts b/frontend/src/pages/ClubDetailPage/components/ClubApplyButton/ClubApplyButton.styles.ts
new file mode 100644
index 000000000..fa2ca81f3
--- /dev/null
+++ b/frontend/src/pages/ClubDetailPage/components/ClubApplyButton/ClubApplyButton.styles.ts
@@ -0,0 +1,46 @@
+import styled from 'styled-components';
+
+export const ApplyButtonContainer = styled.div`
+  width: 100%;
+  display: flex;
+  flex-direction: row;
+  justify-content: center;
+  text-align: center;
+  gap: 10px;
+`;
+
+export const ApplyButton = styled.button`
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  border: none;
+  border-radius: 10px;
+  cursor: pointer;
+  transition: transform 0.2s ease-in-out;
+  background-color: #ff7543;
+
+  padding: 10px 40px;
+  width: 517px;
+  height: 50px;
+  font-size: 20px;
+  font-style: normal;
+  font-weight: 700;
+  color: #fff;
+  text-align: center;
+
+  img {
+    font-size: 12px;
+    font-weight: 600;
+  }
+
+  @media (max-width: 500px) {
+    width: 280px;
+  }
+`;
+
+export const Separator = styled.span`
+  margin: 0 8px;
+  border-left: 1px solid #787878;
+  height: 12px;
+  display: inline-block;
+`;
\ No newline at end of file
diff --git a/frontend/src/pages/ClubDetailPage/components/ClubApplyButton/ClubApplyButton.tsx b/frontend/src/pages/ClubDetailPage/components/ClubApplyButton/ClubApplyButton.tsx
new file mode 100644
index 000000000..b7b72c630
--- /dev/null
+++ b/frontend/src/pages/ClubDetailPage/components/ClubApplyButton/ClubApplyButton.tsx
@@ -0,0 +1,124 @@
+import * as Styled from './ClubApplyButton.styles';
+import { useNavigate, useParams } from 'react-router-dom';
+import { useGetClubDetail } from '@/hooks/queries/club/useGetClubDetail';
+import getApplication from '@/apis/application/getApplication';
+import useMixpanelTrack from '@/hooks/useMixpanelTrack';
+import { USER_EVENT } from '@/constants/eventName';
+import { useState } from 'react';
+import { ApplicationForm, ApplicationFormMode } from '@/types/application';
+import getApplicationOptions from '@/apis/application/getApplicationOptions';
+import ApplicationSelectModal from '@/components/application/modals/ApplicationSelectModal';
+import ShareButton from '../ShareButton/ShareButton';
+
+interface ClubApplyButtonProps {
+  deadlineText?: string;
+}
+
+const RECRUITMENT_STATUS = {
+  ALWAYS: '상시 모집',
+  CLOSED: '모집 마감',
+};
+
+const ClubApplyButton = ({ deadlineText }: ClubApplyButtonProps) => {
+  const { clubId } = useParams<{ clubId: string }>();
+  const navigate = useNavigate();
+  const trackEvent = useMixpanelTrack();
+  const { data: clubDetail } = useGetClubDetail(clubId!);
+
+  // 모달 옵션 상태
+  const [isOpen, setIsOpen] = useState(false);
+  const [options, setOptions] = useState<ApplicationForm[]>([]);
+
+  if (!clubId || !clubDetail) return null;
+
+  // 내부 폼 이동
+  const goWithForm = async (formId: string) => {
+    try {
+      const formDetail = await getApplication(clubId, formId);
+      if (formDetail?.formMode === ApplicationFormMode.EXTERNAL) {
+        const externalApplicationUrl =
+          formDetail.externalApplicationUrl?.trim();
+        if (externalApplicationUrl) {
+          window.open(externalApplicationUrl, '_blank', 'noopener,noreferrer');
+          return;
+        }
+      }
+      navigate(`/application/${clubId}/${formId}`, { state: { formDetail } });
+      setIsOpen(false);
+    } catch (error) {
+      console.error('지원서 조회 중 오류가 발생했습니다', error);
+      alert(
+        '지원서 정보를 불러오는 중 오류가 발생했습니다. 다시 시도해주세요.',
+      );
+    }
+  };
+
+  // url 존재 시 외부, 내부 지원서 옵션에 따른 처리
+  const openByOption = (option?: ApplicationForm) => {
+    if (!option) return;
+    void goWithForm(option.id);
+  };
+
+  const handleClick = async () => {
+    trackEvent(USER_EVENT.CLUB_APPLY_BUTTON_CLICKED);
+
+    if (deadlineText === RECRUITMENT_STATUS.CLOSED) {
+      alert(`현재 ${clubDetail.name} 동아리는 모집 기간이 아닙니다.`);
+      return;
+    }
+
+    try {
+      const list = await getApplicationOptions(clubId);
+
+      if (list.length <= 0) {
+        return;
+      }
+
+      if (list.length === 1) {
+        await goWithForm(list[0].id);
+        return;
+      }
+      setOptions(list);
+      setIsOpen(true);
+    } catch (e) {
+      setOptions([]);
+      setIsOpen(true);
+      console.error('지원서 옵션 조회 중 오류가 발생했습니다.', e);
+    }
+  };
+
+  const renderButtonContent = () => {
+    if (deadlineText === RECRUITMENT_STATUS.CLOSED) {
+      return RECRUITMENT_STATUS.CLOSED;
+    }
+
+    return (
+      <>
+        지원하기
+        {deadlineText && deadlineText !== RECRUITMENT_STATUS.ALWAYS && (
+          <>
+            <Styled.Separator />
+            {deadlineText}
+          </>
+        )}
+      </>
+    );
+  };
+
+  return (
+    <Styled.ApplyButtonContainer>
+      <ShareButton clubId={clubId} />
+      <Styled.ApplyButton onClick={handleClick}>
+        {renderButtonContent()}
+      </Styled.ApplyButton>
+      <ApplicationSelectModal
+        isOpen={isOpen}
+        onClose={() => setIsOpen(false)}
+        options={options}
+        onSelect={openByOption}
+      />
+    </Styled.ApplyButtonContainer>
+  );
+};
+
+export default ClubApplyButton;
\ No newline at end of file
diff --git a/frontend/src/pages/ClubDetailPage/components/ClubDetailFooter/ClubDetailFooter.styles.ts b/frontend/src/pages/ClubDetailPage/components/ClubDetailFooter/ClubDetailFooter.styles.ts
new file mode 100644
index 000000000..a27fe5716
--- /dev/null
+++ b/frontend/src/pages/ClubDetailPage/components/ClubDetailFooter/ClubDetailFooter.styles.ts
@@ -0,0 +1,17 @@
+import styled from 'styled-components';
+
+export const ClubDetailFooterContainer = styled.div`
+  position: sticky;
+  bottom: 0;
+  width: 100%;
+  z-index: 1050; // TODO: Portal로 모달 분리 후 header보다 낮게 재조정
+  padding: 10px 40px;
+
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 16px;
+
+  background-color: white;
+  border-top: 1px solid #cdcdcd;
+`;
\ No newline at end of file
diff --git a/frontend/src/pages/ClubDetailPage/components/ClubDetailFooter/ClubDetailFooter.tsx b/frontend/src/pages/ClubDetailPage/components/ClubDetailFooter/ClubDetailFooter.tsx
new file mode 100644
index 000000000..442007ff3
--- /dev/null
+++ b/frontend/src/pages/ClubDetailPage/components/ClubDetailFooter/ClubDetailFooter.tsx
@@ -0,0 +1,28 @@
+import getDeadlineText from '@/utils/getDeadLineText';
+import { recruitmentDateParser } from '@/utils/recruitmentDateParser';
+import ClubApplyButton from '../ClubApplyButton/ClubApplyButton';
+import * as Styled from './ClubDetailFooter.styles';
+
+interface ClubDetailFooterProps {
+  recruitmentStart: string;
+  recruitmentEnd: string;
+}
+
+const ClubDetailFooter = ({
+  recruitmentStart,
+  recruitmentEnd,
+}: ClubDetailFooterProps) => {
+  const deadlineText = getDeadlineText(
+    recruitmentDateParser(recruitmentStart),
+    recruitmentDateParser(recruitmentEnd),
+    new Date(),
+  );
+
+  return (
+    <Styled.ClubDetailFooterContainer>
+      <ClubApplyButton deadlineText={deadlineText} />
+    </Styled.ClubDetailFooterContainer>
+  );
+};
+
+export default ClubDetailFooter;
diff --git a/frontend/src/pages/ClubDetailPage/components/ShareButton/ShareButton.styles.ts b/frontend/src/pages/ClubDetailPage/components/ShareButton/ShareButton.styles.ts
new file mode 100644
index 000000000..ea18b7e0d
--- /dev/null
+++ b/frontend/src/pages/ClubDetailPage/components/ShareButton/ShareButton.styles.ts
@@ -0,0 +1,12 @@
+import styled from 'styled-components';
+
+export const ShareButtonContainer = styled.div`
+  display: flex;
+  justify-content: flex-end;
+  cursor: pointer;
+`;
+
+export const ShareButtonIcon = styled.img`
+  width: 50px;
+  height: 50px;
+`;
\ No newline at end of file
diff --git a/frontend/src/pages/ClubDetailPage/components/ShareButton/ShareButton.tsx b/frontend/src/pages/ClubDetailPage/components/ShareButton/ShareButton.tsx
new file mode 100644
index 000000000..7cd801006
--- /dev/null
+++ b/frontend/src/pages/ClubDetailPage/components/ShareButton/ShareButton.tsx
@@ -0,0 +1,62 @@
+import * as Styled from './ShareButton.styles';
+import { useGetClubDetail } from '@/hooks/queries/club/useGetClubDetail';
+import useMixpanelTrack from '@/hooks/useMixpanelTrack';
+import ShareIcon from '@/assets/images/icons/share_icon.svg';
+import { USER_EVENT } from '@/constants/eventName';
+
+interface ShareButtonProps {
+  clubId: string;
+}
+
+const MOADONG_BASE_URL = 'https://www.moadong.com/club/';
+const DEFAULT_IMAGE_URL =
+  'https://avatars.githubusercontent.com/u/200371900?s=200&v=4';
+
+const ShareButton = ({ clubId }: ShareButtonProps) => {
+  const { data: clubDetail } = useGetClubDetail(clubId);
+  const trackEvent = useMixpanelTrack();
+
+  if (!clubDetail) return;
+
+  const handleShare = () => {
+    if (!window.Kakao || !window.Kakao.isInitialized()) {
+      alert('카카오 SDK가 아직 준비되지 않았습니다.');
+      return;
+    }
+
+    window.Kakao.Share.sendDefault({
+      objectType: 'feed',
+      content: {
+        title: clubDetail.name,
+        description: clubDetail.description,
+        imageUrl: clubDetail.logo ? clubDetail.logo : DEFAULT_IMAGE_URL,
+        link: {
+          mobileWebUrl: `${MOADONG_BASE_URL}${clubDetail.id}`,
+          webUrl: `${MOADONG_BASE_URL}${clubDetail.id}`,
+        },
+      },
+      buttons: [
+        {
+          title: '모아동에서 지원하기',
+          link: {
+            mobileWebUrl: `${MOADONG_BASE_URL}${clubDetail.id}`,
+            webUrl: `${MOADONG_BASE_URL}${clubDetail.id}`,
+          },
+        },
+      ],
+    });
+    trackEvent(USER_EVENT.SHARE_BUTTON_CLICKED, { clubName: clubDetail.name });
+  };
+
+  return (
+    <Styled.ShareButtonContainer
+      onClick={handleShare}
+      role='button'
+      aria-label='카카오톡으로 동아리 정보 공유하기'
+    >
+      <Styled.ShareButtonIcon src={ShareIcon} alt='카카오톡 공유' />
+    </Styled.ShareButtonContainer>
+  );
+};
+
+export default ShareButton;
\ No newline at end of file
diff --git a/frontend/src/types/club.ts b/frontend/src/types/club.ts
index 6e41f36ff..a77ed5dba 100644
--- a/frontend/src/types/club.ts
+++ b/frontend/src/types/club.ts
@@ -24,8 +24,8 @@ export interface ClubDetail extends Club {
   presidentPhoneNumber: string;
 
   recruitmentForm: string;
-  recruitmentStart: string | null;
-  recruitmentEnd: string | null;
+  recruitmentStart: string;
+  recruitmentEnd: string;
   recruitmentTarget: string;
 
   socialLinks: Record<SNSPlatform, string>;
diff --git a/frontend/src/utils/recruitmentDateParser.test.ts b/frontend/src/utils/recruitmentDateParser.test.ts
index 9ed8cad8e..8cfeec096 100644
--- a/frontend/src/utils/recruitmentDateParser.test.ts
+++ b/frontend/src/utils/recruitmentDateParser.test.ts
@@ -34,11 +34,14 @@ describe('모집 마감 날짜 입력 처리', () => {
     );
   });
 
-  it('아무 값도 입력하지 않으면 오류가 발생한다', () => {
+  it('아무 값도 입력하지 않으면 null을 반환한다', () => {
     const input = '';
-    expect(() => recruitmentDateParser(input)).toThrow(
-      '유효하지 않은 날짜 형식입니다. 형식은 "YYYY.MM.DD HH:mm" 이어야 합니다.',
-    );
+    expect(recruitmentDateParser(input)).toBeNull();
+  });
+
+  it("'미정'을 입력하면 null을 반환한다", () => {
+    const input = '미정';
+    expect(recruitmentDateParser(input)).toBeNull();
   });
 
   it('사용자가 지정된 형식이 아닌 날짜를 입력하면 오류를 안내한다', () => {
diff --git a/frontend/src/utils/recruitmentDateParser.ts b/frontend/src/utils/recruitmentDateParser.ts
index bcdfc4fd8..0a055f486 100644
--- a/frontend/src/utils/recruitmentDateParser.ts
+++ b/frontend/src/utils/recruitmentDateParser.ts
@@ -1,6 +1,7 @@
 import { isValid, parse } from 'date-fns';
 
-export const recruitmentDateParser = (s: string): Date => {
+export const recruitmentDateParser = (s: string): Date | null => {
+  if (s === '미정' || !s) return null;
   const regex = /^\d{4}\.\d{2}\.\d{2} \d{2}:\d{2}$/;
   if (!regex.test(s)) {
     throw new Error(