diff --git a/src/main/java/starlight/adapter/businessplan/persistence/BusinessPlanJpa.java b/src/main/java/starlight/adapter/businessplan/persistence/BusinessPlanJpa.java
index ce461cc3..a9c339e0 100644
--- a/src/main/java/starlight/adapter/businessplan/persistence/BusinessPlanJpa.java
+++ b/src/main/java/starlight/adapter/businessplan/persistence/BusinessPlanJpa.java
@@ -22,6 +22,13 @@ public BusinessPlan getOrThrow(Long id) {
         );
     }
 
+    @Override
+    public BusinessPlan getOrThrowWithAllSubSections(Long id) {
+        return businessPlanRepository.findByIdWithAllSubSections(id).orElseThrow(
+                () -> new BusinessPlanException(BusinessPlanErrorType.BUSINESS_PLAN_NOT_FOUND)
+        );
+    }
+
     @Override
     public BusinessPlan save(BusinessPlan businessPlan) {
         return businessPlanRepository.save(businessPlan);
diff --git a/src/main/java/starlight/adapter/businessplan/persistence/BusinessPlanRepository.java b/src/main/java/starlight/adapter/businessplan/persistence/BusinessPlanRepository.java
index 10beb7a6..390e4653 100644
--- a/src/main/java/starlight/adapter/businessplan/persistence/BusinessPlanRepository.java
+++ b/src/main/java/starlight/adapter/businessplan/persistence/BusinessPlanRepository.java
@@ -16,10 +16,33 @@ public interface BusinessPlanRepository extends JpaRepository<BusinessPlan, Long
     Optional<BusinessPlan> findById(Long id);
 
     @Query("""
-    SELECT bp
-    FROM BusinessPlan bp
-    WHERE bp.memberId = :memberId
-    ORDER BY COALESCE(bp.modifiedAt, bp.createdAt) DESC, bp.id DESC
-    """)
+            SELECT bp
+            FROM BusinessPlan bp
+            WHERE bp.memberId = :memberId
+            ORDER BY COALESCE(bp.modifiedAt, bp.createdAt) DESC, bp.id DESC
+            """)
     Page<BusinessPlan> findAllByMemberIdOrderedByLastSavedAt(@Param("memberId") Long memberId, Pageable pageable);
+
+    @Query("""
+            SELECT DISTINCT bp
+            FROM BusinessPlan bp
+            LEFT JOIN FETCH bp.overview o
+            LEFT JOIN FETCH o.overviewBasic
+            LEFT JOIN FETCH bp.problemRecognition pr
+            LEFT JOIN FETCH pr.problemBackground
+            LEFT JOIN FETCH pr.problemPurpose
+            LEFT JOIN FETCH pr.problemMarket
+            LEFT JOIN FETCH bp.feasibility f
+            LEFT JOIN FETCH f.feasibilityStrategy
+            LEFT JOIN FETCH f.feasibilityMarket
+            LEFT JOIN FETCH bp.growthTactic gt
+            LEFT JOIN FETCH gt.growthModel
+            LEFT JOIN FETCH gt.growthFunding
+            LEFT JOIN FETCH gt.growthEntry
+            LEFT JOIN FETCH bp.teamCompetence tc
+            LEFT JOIN FETCH tc.teamFounder
+            LEFT JOIN FETCH tc.teamMembers
+            WHERE bp.id = :id
+            """)
+    Optional<BusinessPlan> findByIdWithAllSubSections(@Param("id") Long id);
 }
diff --git a/src/main/java/starlight/application/businessplan/BusinessPlanServiceImpl.java b/src/main/java/starlight/application/businessplan/BusinessPlanServiceImpl.java
index ba5247fa..b7d5a4ce 100644
--- a/src/main/java/starlight/application/businessplan/BusinessPlanServiceImpl.java
+++ b/src/main/java/starlight/application/businessplan/BusinessPlanServiceImpl.java
@@ -72,7 +72,10 @@ public BusinessPlanResponse.Result getBusinessPlanInfo(Long planId, Long memberI
     @Override
     @Transactional(readOnly = true)
     public BusinessPlanResponse.Detail getBusinessPlanDetail(Long planId, Long memberId) {
-        BusinessPlan plan = getOwnedBusinessPlanOrThrow(planId, memberId);
+        BusinessPlan plan = businessPlanQuery.getOrThrowWithAllSubSections(planId);
+        if (!plan.isOwnedBy(memberId)) {
+            throw new BusinessPlanException(BusinessPlanErrorType.UNAUTHORIZED_ACCESS);
+        }
 
         List<SubSectionResponse.Detail> subSectionDetailList = Arrays.stream(SubSectionType.values())
                 .map(type -> getSectionByPlanAndType(plan, type.getSectionType()).getSubSectionByType(type))
diff --git a/src/main/java/starlight/application/businessplan/required/BusinessPlanQuery.java b/src/main/java/starlight/application/businessplan/required/BusinessPlanQuery.java
index 1fe30fa9..785cc04c 100644
--- a/src/main/java/starlight/application/businessplan/required/BusinessPlanQuery.java
+++ b/src/main/java/starlight/application/businessplan/required/BusinessPlanQuery.java
@@ -8,6 +8,8 @@ public interface BusinessPlanQuery {
 
     BusinessPlan getOrThrow(Long id);
 
+    BusinessPlan getOrThrowWithAllSubSections(Long id);
+
     BusinessPlan save(BusinessPlan businessPlan);
 
     void delete(BusinessPlan businessPlan);
diff --git a/src/test/java/starlight/application/businessplan/BusinessPlanServiceImplUnitTest.java b/src/test/java/starlight/application/businessplan/BusinessPlanServiceImplUnitTest.java
index 4c579585..2507c705 100644
--- a/src/test/java/starlight/application/businessplan/BusinessPlanServiceImplUnitTest.java
+++ b/src/test/java/starlight/application/businessplan/BusinessPlanServiceImplUnitTest.java
@@ -337,7 +337,7 @@ void getBusinessPlanSubSections_returnsExistingSubSectionList() {
                 List.of(false, false, false, false, false));
         plan.getProblemRecognition().putSubSection(problem);
 
-        when(businessPlanQuery.getOrThrow(1L)).thenReturn(plan);
+        when(businessPlanQuery.getOrThrowWithAllSubSections(1L)).thenReturn(plan);
 
         BusinessPlanResponse.Detail detail = sut.getBusinessPlanDetail(1L, 10L);
 
@@ -355,7 +355,7 @@ void getBusinessPlanSubSections_returnsExistingSubSectionList() {
     void getBusinessPlanDetail_unauthorized_throws() {
         BusinessPlan plan = mock(BusinessPlan.class);
         when(plan.isOwnedBy(10L)).thenReturn(false);
-        when(businessPlanQuery.getOrThrow(1L)).thenReturn(plan);
+        when(businessPlanQuery.getOrThrowWithAllSubSections(1L)).thenReturn(plan);
 
         org.junit.jupiter.api.Assertions.assertThrows(BusinessPlanException.class,
                 () -> sut.getBusinessPlanDetail(1L, 10L));