diff --git a/frontend/src/routes/study/+page.svelte b/frontend/src/routes/study/+page.svelte
index 463137c..ce26300 100644
--- a/frontend/src/routes/study/+page.svelte
+++ b/frontend/src/routes/study/+page.svelte
@@ -3,14 +3,19 @@
   // 주제로 보기(퀴즈·복습·통계) / 자료 학습 / 필사 세션 / 암기카드 검수.
   import { onMount } from 'svelte';
   import { api } from '$lib/api';
-  import { BookOpen, PenLine, GraduationCap, FolderKanban, Layers, Repeat } from 'lucide-svelte';
+  import { BookOpen, PenLine, GraduationCap, FolderKanban, Layers, Repeat, Flag } from 'lucide-svelte';
 
   let cardReviewCount = $state(0);
+  let questionFlagCount = $state(0);
   onMount(async () => {
     try {
       const r = await api('/study-cards/needs-review/count');
       cardReviewCount = r?.count ?? 0;
     } catch {}
+    try {
+      const r2 = await api('/study-questions/needs-review/count');
+      questionFlagCount = r2?.count ?? 0;
+    } catch {}
   });
 </script>
 
@@ -78,7 +83,21 @@
         <Repeat size={18} class="text-accent" />
         <h2 class="text-base font-semibold text-text">암기카드 학습</h2>
       </div>
-      <p class="text-xs text-dim">검수한 암기카드를 모바일에서 학습. <b>복습(간격반복 1·3·7·14일)</b>으로 자기평가하거나, <b>그냥 공부</b>로 덜 본 카드를 휙휙 훑어봅니다.</p>
+      <p class="text-xs text-dim">검수한 암기카드를 모바일에서 학습. <b>복습(간격반복 1·3·7·14일)</b>으로 자기평가하거나, <b>그냥 공부</b>로 덜 본 카드를 가볍게 훑어봅니다.</p>
+    </a>
+
+    <a
+      href="/study/questions-review"
+      class="block p-5 rounded-lg border border-default bg-surface hover:border-accent hover:bg-accent/5 transition-colors"
+    >
+      <div class="flex items-center gap-2 mb-2">
+        <Flag size={18} class="text-accent" />
+        <h2 class="text-base font-semibold text-text">문제 신고함</h2>
+        {#if questionFlagCount > 0}
+          <span class="ml-auto rounded-full bg-warning px-2 py-0.5 text-xs font-bold text-white">{questionFlagCount}</span>
+        {/if}
+      </div>
+      <p class="text-xs text-dim">퀴즈·문제 화면에서 <b>이상하다고 신고한 문제</b>를 모아 확인하고 수정·검토 완료·폐기합니다.</p>
     </a>
   </div>
 
diff --git a/frontend/src/routes/study/questions-review/+page.svelte b/frontend/src/routes/study/questions-review/+page.svelte
new file mode 100644
index 0000000..db8c4b4
--- /dev/null
+++ b/frontend/src/routes/study/questions-review/+page.svelte
@@ -0,0 +1,125 @@
+<script>
+  /**
+   * /study/questions-review — 문제 신고함 (이상 태깅된 study_questions 검수).
+   *
+   * 퀴즈/문제 화면의 '이 문제 이상해요'(PATCH needs_review=true)로 신고된 문제를 전 토픽 횡단으로 모아
+   * 확인 → 수정 / 검토 완료(신고 해제) / 폐기. 암기카드 검수(/study/cards-review)의 문제 버전.
+   *
+   * backend: GET /study-questions/needs-review (목록) · /needs-review/count (배지)
+   *          PATCH /study-questions/{id} {needs_review:false} (검토 완료) · DELETE /study-questions/{id} (폐기, soft)
+   */
+  import { onMount } from 'svelte';
+  import { goto } from '$app/navigation';
+  import { api } from '$lib/api';
+  import { addToast } from '$lib/stores/toast';
+  import { ArrowLeft, Flag, Check, Pencil, Trash2, Eye } from 'lucide-svelte';
+  import Button from '$lib/components/ui/Button.svelte';
+  import Skeleton from '$lib/components/ui/Skeleton.svelte';
+  import EmptyState from '$lib/components/ui/EmptyState.svelte';
+
+  let loading = $state(true);
+  let items = $state([]); // [{id, study_topic_id, question_text, flagged_at, flagged_by}]
+
+  // flagged_by 사유 → 라벨/색 (서버 상수: user / source_changed / source_deleted)
+  const REASON = {
+    user: { label: '직접 신고', cls: 'border-warning/40 text-warning bg-warning/10' },
+    source_changed: { label: '문제 수정됨', cls: 'border-accent-ring text-accent bg-accent/10' },
+    source_deleted: { label: '문제 삭제됨', cls: 'border-error/40 text-error bg-error/10' },
+  };
+  function reasonOf(by) {
+    return REASON[by] ?? { label: '신고', cls: 'border-default text-dim bg-surface' };
+  }
+
+  async function load() {
+    loading = true;
+    try {
+      items = (await api('/study-questions/needs-review')) ?? [];
+    } catch (err) {
+      addToast('error', err?.detail || '신고 목록 조회 실패');
+      items = [];
+    } finally {
+      loading = false;
+    }
+  }
+
+  function removeLocal(id) {
+    items = items.filter((it) => it.id !== id);
+  }
+
+  async function resolve(it) {
+    try {
+      await api(`/study-questions/${it.id}`, {
+        method: 'PATCH',
+        body: JSON.stringify({ needs_review: false }),
+      });
+      removeLocal(it.id);
+      addToast('success', '검토 완료 — 신고를 해제했어요');
+    } catch (err) {
+      addToast('error', err?.detail || '처리 실패');
+    }
+  }
+
+  async function discard(it) {
+    if (!confirm('이 문제를 폐기할까요? (되돌릴 수 없음)')) return;
+    try {
+      await api(`/study-questions/${it.id}`, { method: 'DELETE' });
+      removeLocal(it.id);
+      addToast('success', '문제를 폐기했어요');
+    } catch (err) {
+      addToast('error', err?.detail || '삭제 실패');
+    }
+  }
+
+  function fmtDate(s) {
+    if (!s) return '';
+    return new Date(s).toLocaleString('ko-KR', { dateStyle: 'short', timeStyle: 'short' });
+  }
+
+  onMount(load);
+</script>
+
+<svelte:head><title>문제 신고함</title></svelte:head>
+
+<div class="mx-auto max-w-3xl px-4 py-6">
+  <div class="mb-5 flex items-center gap-3">
+    <Button variant="ghost" size="sm" icon={ArrowLeft} onclick={() => goto('/study')}>공부</Button>
+    <h1 class="text-xl font-bold text-text">문제 신고함</h1>
+    {#if items.length > 0}
+      <span class="rounded-full bg-warning px-2.5 py-0.5 text-xs font-bold text-white">{items.length}</span>
+    {/if}
+  </div>
+
+  <p class="mb-4 text-sm text-dim">
+    퀴즈나 문제 화면에서 <b class="text-text">이상하다고 신고한 문제</b>가 여기에 모입니다.
+    내용을 확인해 <b class="text-text">수정하거나, 검토 완료(신고 해제)하거나, 폐기</b>하세요.
+  </p>
+
+  {#if loading}
+    <div class="space-y-3">{#each Array(4).fill(0) as _, i (i)}<Skeleton class="h-24 w-full" />{/each}</div>
+  {:else if items.length === 0}
+    <EmptyState
+      title="신고된 문제가 없습니다"
+      description="문제나 정답이 이상할 때 퀴즈·문제 화면의 '이 문제 이상해요'로 신고하면 여기에 쌓입니다."
+      icon={Flag}
+    />
+  {:else}
+    <div class="space-y-2.5">
+      {#each items as it (it.id)}
+        {@const r = reasonOf(it.flagged_by)}
+        <div class="rounded-card border border-default bg-surface p-3.5">
+          <div class="mb-2 flex items-center gap-2">
+            <span class="rounded-full border px-2 py-0.5 text-[11px] font-semibold {r.cls}">{r.label}</span>
+            {#if it.flagged_at}<span class="text-[11px] text-faint">{fmtDate(it.flagged_at)}</span>{/if}
+          </div>
+          <div class="text-sm leading-relaxed text-text">{it.question_text}</div>
+          <div class="mt-3 flex flex-wrap gap-2">
+            <Button href={`/study/topics/${it.study_topic_id}/questions/${it.id}`} variant="secondary" size="sm" icon={Eye}>문제 보기</Button>
+            <Button href={`/study/topics/${it.study_topic_id}/questions/${it.id}/edit`} variant="ghost" size="sm" icon={Pencil}>수정</Button>
+            <Button variant="ghost" size="sm" icon={Check} onclick={() => resolve(it)}>검토 완료</Button>
+            <Button variant="danger" size="sm" icon={Trash2} onclick={() => discard(it)}>폐기</Button>
+          </div>
+        </div>
+      {/each}
+    </div>
+  {/if}
+</div>
diff --git a/frontend/src/routes/study/topics/[id]/questions/[qid]/+page.svelte b/frontend/src/routes/study/topics/[id]/questions/[qid]/+page.svelte
index 996be4e..627aa3f 100644
--- a/frontend/src/routes/study/topics/[id]/questions/[qid]/+page.svelte
+++ b/frontend/src/routes/study/topics/[id]/questions/[qid]/+page.svelte
@@ -22,7 +22,7 @@
   import { api } from '$lib/api';
   import { addToast } from '$lib/stores/toast';
   import {
-    ArrowLeft, ArrowRight, Edit, Sparkles, AlertCircle, CheckCircle2, XCircle, ListChecks,
+    ArrowLeft, ArrowRight, Edit, Sparkles, AlertCircle, CheckCircle2, XCircle, ListChecks, Flag,
   } from 'lucide-svelte';
   import { renderMathMarkdown, renderMathMarkdownInline } from '$lib/utils/mathMarkdown';
   import Button from '$lib/components/ui/Button.svelte';
@@ -237,6 +237,26 @@
     if (!s) return '';
     return new Date(s).toLocaleString('ko-KR', { dateStyle: 'short', timeStyle: 'short' });
   }
+
+  // 이 문제 이상해요 신고 토글 (PATCH needs_review). 신고함(/study/questions-review)에 모임.
+  let flagBusy = $state(false);
+  async function toggleFlag() {
+    if (flagBusy || !q) return;
+    flagBusy = true;
+    const next = !q.needs_review;
+    try {
+      const res = await api(`/study-questions/${qid}`, {
+        method: 'PATCH',
+        body: JSON.stringify({ needs_review: next }),
+      });
+      q = { ...q, needs_review: res.needs_review, flagged_by: res.flagged_by, flagged_at: res.flagged_at };
+      addToast(next ? 'success' : 'info', next ? '이상 문제로 신고했어요 — 검수함에 모았습니다' : '신고를 해제했어요');
+    } catch (err) {
+      addToast('error', err?.detail || '신고 처리 실패');
+    } finally {
+      flagBusy = false;
+    }
+  }
 </script>
 
 <svelte:head><title>문제 상세 — {topicName || '주제'}</title></svelte:head>
@@ -279,7 +299,22 @@
                 {#if !q.is_active}<span class="text-warning">· 비활성</span>{/if}
               </div>
             </div>
-            <Button href={`/study/topics/${topicId}/questions/${qid}/edit`} size="sm" variant="ghost" icon={Edit}>편집</Button>
+            <div class="flex items-center gap-1.5 shrink-0">
+              <button
+                type="button"
+                onclick={toggleFlag}
+                disabled={flagBusy}
+                class="flex items-center gap-1.5 text-xs h-7 px-2.5 rounded-md border transition-colors disabled:opacity-50
+                  {q.needs_review
+                    ? 'border-warning bg-warning/10 text-warning'
+                    : 'border-default text-dim hover:text-warning hover:border-warning/40'}"
+                title="문제나 정답이 이상하면 신고해 검수함에 모아둡니다"
+              >
+                <Flag size={13} />
+                <span>{q.needs_review ? '신고됨' : '이 문제 이상해요'}</span>
+              </button>
+              <Button href={`/study/topics/${topicId}/questions/${qid}/edit`} size="sm" variant="ghost" icon={Edit}>편집</Button>
+            </div>
           </div>
 
           <!-- 본문 -->
diff --git a/frontend/src/routes/study/topics/[id]/quiz-sessions/[sid]/+page.svelte b/frontend/src/routes/study/topics/[id]/quiz-sessions/[sid]/+page.svelte
index 843025d..b376dd3 100644
--- a/frontend/src/routes/study/topics/[id]/quiz-sessions/[sid]/+page.svelte
+++ b/frontend/src/routes/study/topics/[id]/quiz-sessions/[sid]/+page.svelte
@@ -14,7 +14,7 @@
   import { api } from '$lib/api';
   import { addToast } from '$lib/stores/toast';
   import {
-    ArrowLeft, CheckCircle2, XCircle, HelpCircle, Sparkles, BookOpen, AlertCircle, Square, CheckSquare,
+    ArrowLeft, CheckCircle2, XCircle, HelpCircle, Sparkles, BookOpen, AlertCircle, Square, CheckSquare, Flag,
   } from 'lucide-svelte';
   import { renderMathMarkdown, renderMathMarkdownInline } from '$lib/utils/mathMarkdown';
   import Button from '$lib/components/ui/Button.svelte';
@@ -36,6 +36,24 @@
   // PR-12-A: 카드별 round_count 배지 (틀린/모르겠음 헤더에 표시).
   let relatedCounts = $state({}); // { [qid]: { repeat_round_count, similar_round_count, ... } }
 
+  // 문제 신고(이상 태깅): qid -> true. 검수함(/study/questions-review)에 모임.
+  let flagged = $state({});
+  let flagBusy = $state({});
+  async function flagQuestion(qid) {
+    if (flagBusy[qid]) return;
+    const next = !flagged[qid];
+    flagBusy = { ...flagBusy, [qid]: true };
+    try {
+      const res = await api(`/study-questions/${qid}`, { method: 'PATCH', body: JSON.stringify({ needs_review: next }) });
+      flagged = { ...flagged, [qid]: res?.needs_review ?? next };
+      addToast(next ? 'success' : 'info', next ? '이상 문제로 신고했어요 — 검수함에 모았습니다' : '신고를 해제했어요');
+    } catch (err) {
+      addToast('error', err?.detail || '신고 처리 실패');
+    } finally {
+      flagBusy = { ...flagBusy, [qid]: false };
+    }
+  }
+
   async function loadTopic() {
     try {
       const t = await api(`/study-topics/${topicId}`);
@@ -51,6 +69,8 @@
       if ((detail.summary.wrong_count ?? 0) > 0) activeTab = 'wrong';
       else if ((detail.summary.unsure_count ?? 0) > 0) activeTab = 'unsure';
       else activeTab = 'correct';
+      // 신고 상태의 영속 source 는 신고함 큐(/study/questions-review) — 세션 결과 payload 엔
+      // needs_review 가 없으므로 여기선 세션 내 optimistic 표시만. 새로고침 시 초기화됨.
       // PR-12-A: 카드별 반복 출제/유사 유형 배지 — 1회 bulk 호출.
       void loadRelatedCounts();
     } catch (err) {
@@ -562,8 +582,21 @@
                 {@render subjectNoteBlock(it, cardState)}
               {/if}
 
-              {#if kind !== 'correct'}
-                <div class="flex justify-end pt-2 border-t border-default">
+              <div class="flex items-center justify-between gap-2 pt-2 border-t border-default">
+                <button
+                  type="button"
+                  onclick={() => flagQuestion(it.q.id)}
+                  disabled={flagBusy[it.q.id]}
+                  class="flex items-center gap-1.5 text-xs px-2.5 py-1.5 rounded border transition-colors disabled:opacity-50
+                    {flagged[it.q.id]
+                      ? 'border-warning bg-warning/10 text-warning'
+                      : 'border-default text-dim hover:text-warning hover:border-warning/40'}"
+                  title="문제나 정답이 이상하면 신고해 검수함에 모아둡니다"
+                >
+                  <Flag size={13} />
+                  <span>{flagged[it.q.id] ? '신고됨' : '이 문제 이상해요'}</span>
+                </button>
+                {#if kind !== 'correct'}
                   <button
                     type="button"
                     onclick={() => toggleReviewed(it.attempt)}
@@ -575,8 +608,8 @@
                     {#if reviewed}<CheckSquare size={14} />{:else}<Square size={14} />{/if}
                     <span>{reviewed ? '학습완료' : '학습완료로 표시'}</span>
                   </button>
-                </div>
-              {/if}
+                {/if}
+              </div>
             </div>
           {/if}
         </li>