diff --git a/src/components/attendance/AttendanceCodeModal.tsx b/src/components/attendance/AttendanceCodeModal.tsx
index 3c2229b2..ea9ea04f 100644
--- a/src/components/attendance/AttendanceCodeModal.tsx
+++ b/src/components/attendance/AttendanceCodeModal.tsx
@@ -1,6 +1,6 @@
 'use client';
 
-import { useState, useEffect, useRef } from 'react';
+import { useState } from 'react';
 
 import { CheckRoundIcon } from '@/assets/icons';
 import {
@@ -13,10 +13,12 @@ import {
   Icon,
 } from '@/components/ui';
 import { InputOTP } from '@/components/attendance/InputOTP';
-import { useAttendanceSSE } from '@/hooks/attendance';
-import { useRemainingTime } from '@/hooks';
+// TODO: SSE 연결 안정화 후 복원
+// import { useEffect, useRef } from 'react';
+// import { useAttendanceSSE } from '@/hooks/attendance';
+// import { useRemainingTime } from '@/hooks';
+// import { toastError } from '@/stores/useToastStore';
 import { formatModalDescription } from '@/lib/formatTime';
-import { toastError } from '@/stores/useToastStore';
 
 interface AttendanceCodeModalProps {
   open: boolean;
@@ -36,36 +38,39 @@ function AttendanceCodeModal({
   location,
 }: AttendanceCodeModalProps) {
   const [code, setCode] = useState('');
-  const { status, expiredAt: sseExpiredAt } = useAttendanceSSE();
-  const isLoading = status === null;
-  const { minutes, seconds, isExpired } = useRemainingTime(sseExpiredAt ?? '');
+  // TODO: SSE 연결 안정화 후 복원
+  // const { status, expiredAt: sseExpiredAt } = useAttendanceSSE();
+  // const isLoading = status === null;
+  // const { minutes, seconds, isExpired } = useRemainingTime(sseExpiredAt ?? '');
   const isComplete = code.length === 6;
   const description = formatModalDescription(start, location);
 
-  const hasShownRef = useRef(false);
+  // TODO: SSE 연결 안정화 후 복원
+  // const hasShownRef = useRef(false);
 
   function handleOpenChange(nextOpen: boolean) {
     if (!nextOpen) setCode('');
     onOpenChange(nextOpen);
   }
 
-  useEffect(() => {
-    if (!open) return;
-    if (status === null) return;
-
-    if ((status === 'qr-none' || status === 'qr-close') && !hasShownRef.current) {
-      hasShownRef.current = true;
-      toastError('현재 출석이 진행 중이 아닙니다.');
-
-      onOpenChange(false);
-    }
-  }, [open, status, onOpenChange]);
-
-  useEffect(() => {
-    if (!open) {
-      hasShownRef.current = false;
-    }
-  }, [open]);
+  // TODO: SSE 연결 안정화 후 복원
+  // useEffect(() => {
+  //   if (!open) return;
+  //   if (status === null) return;
+  //
+  //   if ((status === 'qr-none' || status === 'qr-close') && !hasShownRef.current) {
+  //     hasShownRef.current = true;
+  //     toastError('현재 출석이 진행 중이 아닙니다.');
+  //
+  //     onOpenChange(false);
+  //   }
+  // }, [open, status, onOpenChange]);
+
+  // useEffect(() => {
+  //   if (!open) {
+  //     hasShownRef.current = false;
+  //   }
+  // }, [open]);
 
   return (
     <Dialog open={open} onOpenChange={handleOpenChange}>
@@ -96,7 +101,7 @@ function AttendanceCodeModal({
 
           <InputOTP value={code} onChange={setCode} />
 
-          {isLoading ? (
+          {/* {isLoading ? (
             <p className="typo-caption2 text-text-alternative text-center">
               출석 정보를 불러오는 중...
             </p>
@@ -111,7 +116,9 @@ function AttendanceCodeModal({
             <p className="typo-caption2 text-state-error text-center">
               출석 가능 시간이 만료되었습니다
             </p>
-          )}
+          )} */}
+
+          {/* TODO: SSE 연결 안정화 후 출석 가능 시간 표시 복원 */}
         </DialogBody>
 
         <DialogFooter
@@ -123,7 +130,7 @@ function AttendanceCodeModal({
             variant="primary"
             size="lg"
             className="w-full"
-            disabled={!isComplete || (!isLoading && isExpired)}
+            disabled={!isComplete}
             onClick={() => {
               onConfirm?.(code);
               handleOpenChange(false);
diff --git a/src/components/attendance/AttendanceContent.tsx b/src/components/attendance/AttendanceContent.tsx
index 5c0afa3a..2e653653 100644
--- a/src/components/attendance/AttendanceContent.tsx
+++ b/src/components/attendance/AttendanceContent.tsx
@@ -77,7 +77,7 @@ function AttendanceContent({
     location = null,
   } = attendance ?? {};
   const attendanceRate = attendanceData?.attendanceRate ?? attendance?.attendanceRate ?? 0;
-  const description = formatAttendanceDescription(start ?? '', end ?? '', location ?? '');
+  const description = formatAttendanceDescription(start ?? '', end ?? '', location);
 
   return (
     <>
diff --git a/src/components/attendance/AttendanceQRContent.tsx b/src/components/attendance/AttendanceQRContent.tsx
index d322a6bf..5a9c5682 100644
--- a/src/components/attendance/AttendanceQRContent.tsx
+++ b/src/components/attendance/AttendanceQRContent.tsx
@@ -11,7 +11,9 @@ import {
   BreadcrumbPage,
   BreadcrumbSeparator,
 } from '@/components/ui';
-import { useAttendanceSSE, useAttendanceQR } from '@/hooks/attendance';
+// TODO: SSE 연결 안정화 후 복원
+// import { useAttendanceSSE } from '@/hooks/attendance';
+import { useAttendanceQR } from '@/hooks/attendance';
 import { useRemainingTime } from '@/hooks/useRemainingTime';
 import { useClubId } from '@/stores/useClubStore';
 
@@ -23,8 +25,9 @@ function AttendanceQRContent({ sessionId }: AttendanceQRContentProps) {
   const { clubId: clubIdParam } = useParams<{ clubId: string }>();
   const clubId = useClubId();
   const { qrRef, qrData, isLoading } = useAttendanceQR(clubId, sessionId);
-  const { expiredAt: sseExpiredAt } = useAttendanceSSE();
-  const { minutes, seconds, isExpired } = useRemainingTime(sseExpiredAt ?? '');
+  // TODO: SSE 연결 안정화 후 복원
+  // const { expiredAt: sseExpiredAt } = useAttendanceSSE();
+  const { minutes, seconds, isExpired } = useRemainingTime(qrData?.expiredAt ?? '');
 
   return (
     <div className="mx-auto flex w-full max-w-[1025px] flex-col gap-700 pt-600">
@@ -73,7 +76,11 @@ function AttendanceQRContent({ sessionId }: AttendanceQRContentProps) {
                   <div className="flex items-center gap-200">
                     <span className="typo-sub3 text-text-strong">출석 가능 시간</span>
                     <span className="typo-sub3 text-state-error tabular-nums">
-                      {!sseExpiredAt ? '연결 중...' : isExpired ? '마감' : `${minutes}:${seconds}`}
+                      {!qrData?.expiredAt
+                        ? '로딩 중...'
+                        : isExpired
+                          ? '마감'
+                          : `${minutes}:${seconds}`}
                     </span>
                   </div>
                   <p className="typo-body2 text-text-strong">QR코드는 모바일만 제공하고 있어요.</p>
diff --git a/src/components/attendance/AttendanceTodayCard.tsx b/src/components/attendance/AttendanceTodayCard.tsx
index e8cbe606..28f2b03a 100644
--- a/src/components/attendance/AttendanceTodayCard.tsx
+++ b/src/components/attendance/AttendanceTodayCard.tsx
@@ -7,7 +7,7 @@ import { useState } from 'react';
 import { CompleteIcon, RushIcon } from '@/assets/icons';
 import { Card } from '@/components/ui';
 import { AttendanceCodeModal } from '@/components/attendance/AttendanceCodeModal';
-import { toastError } from '@/stores/useToastStore';
+import { useIsAdmin } from '@/hooks/shared';
 
 interface AttendanceTodayCardProps {
   overline: string;
@@ -55,13 +55,10 @@ function AttendanceTodayCard({
 }: AttendanceTodayCardProps) {
   const router = useRouter();
   const { clubId } = useParams<{ clubId: string }>();
+  const { isAdmin: isAdminUser } = useIsAdmin();
   const [codeModalOpen, setCodeModalOpen] = useState(false);
 
   function handleSecondaryClick() {
-    if (!isAdmin) {
-      toastError('운영진만 사용할 수 있는 기능입니다.');
-      return;
-    }
     if (sessionId == null) return;
     router.push(`/${clubId}/attendance/qr?sessionId=${sessionId}`);
   }
@@ -77,9 +74,11 @@ function AttendanceTodayCard({
         onPrimaryClick={() => setCodeModalOpen(true)}
         primaryButtonText={isChecked ? '출석 완료' : '출석하기'}
         primaryButtonDisabled={disabled || isChecked}
-        onSecondaryClick={handleSecondaryClick}
-        secondaryButtonText="출석코드 확인"
-        secondaryButtonDisabled={disabled || sessionId == null}
+        {...(isAdminUser && {
+          onSecondaryClick: handleSecondaryClick,
+          secondaryButtonText: '출석코드 확인',
+          secondaryButtonDisabled: disabled || sessionId == null,
+        })}
       >
         {isChecked ? (
           <AttendanceBanner
diff --git a/src/hooks/attendance/useCheckIn.ts b/src/hooks/attendance/useCheckIn.ts
index 6c38a5ed..04b8fb85 100644
--- a/src/hooks/attendance/useCheckIn.ts
+++ b/src/hooks/attendance/useCheckIn.ts
@@ -6,7 +6,8 @@ import { ATTENDANCE_ERROR_MESSAGE } from '@/constants/attendance';
 import { useClubId } from '@/stores/useClubStore';
 import { toastError } from '@/stores/useToastStore';
 import { useAttendanceQuery } from '@/hooks/attendance/useAttendanceQuery';
-import { useAttendanceSSE } from '@/hooks/attendance/useAttendanceSSE';
+// TODO: SSE 연결 안정화 후 복원
+// import { useAttendanceSSE } from '@/hooks/attendance/useAttendanceSSE';
 
 interface UseCheckInOptions {
   sessionId?: number | null;
@@ -18,21 +19,23 @@ export function useCheckIn(options?: UseCheckInOptions) {
   const clubId = useClubId();
   const { data } = useAttendanceQuery();
   const { data: profileStatus, isLoading: isProfileLoading } = useProfileStatusQuery();
-  const { status: qrStatus } = useAttendanceSSE();
+  // TODO: SSE 연결 안정화 후 복원
+  // const { status: qrStatus } = useAttendanceSSE();
   const [codeModalOpen, setCodeModalOpen] = useState(false);
   const [cardinalModalOpen, setCardinalModalOpen] = useState(false);
   const [checkedSessionId, setCheckedSessionId] = useState<number | null>(null);
   const [checkInError, setCheckInError] = useState(false);
 
   function openCodeModal() {
-    if (qrStatus === 'qr-none') {
-      toastError('아직 출석 코드가 생성되지 않았습니다.');
-      return;
-    }
-    if (qrStatus === 'qr-close') {
-      toastError('QR 코드가 만료되었거나 존재하지 않습니다.');
-      return;
-    }
+    // TODO: SSE 연결 안정화 후 복원
+    // if (qrStatus === 'qr-none') {
+    //   toastError('아직 출석 코드가 생성되지 않았습니다.');
+    //   return;
+    // }
+    // if (qrStatus === 'qr-close') {
+    //   toastError('QR 코드가 만료되었거나 존재하지 않습니다.');
+    //   return;
+    // }
     setCodeModalOpen(true);
   }
 
@@ -70,7 +73,8 @@ export function useCheckIn(options?: UseCheckInOptions) {
   return {
     isChecked,
     checkInError,
-    qrStatus,
+    // TODO: SSE 연결 안정화 후 복원
+    // qrStatus,
     codeModalOpen,
     setCodeModalOpen,
     openCodeModal,
diff --git a/src/lib/formatTime.ts b/src/lib/formatTime.ts
index f64b8642..664c401c 100644
--- a/src/lib/formatTime.ts
+++ b/src/lib/formatTime.ts
@@ -16,11 +16,12 @@ function formatKoreanDate(date: Date) {
  * 출석 카드용 설명 문자열 생성
  * "날짜 : 2026년 3월 20일 (7:00 PM~9:00 PM)\n장소 : 동아리방"
  */
-function formatAttendanceDescription(start: string, end: string, location: string) {
+function formatAttendanceDescription(start: string, end: string, location: string | null) {
   const startDate = new Date(start);
   const endDate = new Date(end);
 
-  return `날짜 : ${formatKoreanDate(startDate)} (${formatTime(startDate)}~${formatTime(endDate)})\n장소 : ${location}`;
+  const datePart = `날짜 : ${formatKoreanDate(startDate)} (${formatTime(startDate)}~${formatTime(endDate)})`;
+  return location ? `${datePart}\n장소 : ${location}` : datePart;
 }
 
 /**