diff --git a/src/main/kotlin/com/example/onui/domain/diary/repository/QDiaryRepositoryImpl.kt b/src/main/kotlin/com/example/onui/domain/diary/repository/QDiaryRepositoryImpl.kt
new file mode 100644
index 0000000..248b519
--- /dev/null
+++ b/src/main/kotlin/com/example/onui/domain/diary/repository/QDiaryRepositoryImpl.kt
@@ -0,0 +1,29 @@
+package com.example.onui.domain.diary.repository
+
+import com.example.onui.domain.diary.entity.Diary
+import com.example.onui.domain.diary.entity.QDiary.diary
+import com.example.onui.domain.user.entity.User
+import com.querydsl.jpa.impl.JPAQueryFactory
+import org.springframework.stereotype.Repository
+import org.springframework.stereotype.Service
+import org.springframework.transaction.annotation.Transactional
+import java.time.LocalDateTime
+
+@Service
+@Transactional(readOnly = true)
+@Repository
+class QDiaryRepositoryImpl(
+    private val queryFactory: JPAQueryFactory
+): QDiaryRepository {
+
+    override fun find3DayAgoByUser(user: User): Diary? {
+
+        val ago = LocalDateTime.now().minusDays(3)
+
+        return queryFactory.selectFrom(diary)
+            .orderBy(diary.createdAt.desc())
+            .where(diary.user.eq(user).and(diary.createdAt.after(ago)))
+            .limit(1)
+            .fetchOne()
+    }
+}
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