diff --git a/src/main/java/com/example/RealMatch/business/application/service/CollaborationQueryService.java b/src/main/java/com/example/RealMatch/business/application/service/CollaborationQueryService.java
index ad015f5a..4ed763d8 100644
--- a/src/main/java/com/example/RealMatch/business/application/service/CollaborationQueryService.java
+++ b/src/main/java/com/example/RealMatch/business/application/service/CollaborationQueryService.java
@@ -61,6 +61,7 @@ private void getAppliedCampaign(Long userId, CollaborationType type, ProposalSta
                                     p.campaignId(),
                                     null,
                                     p.brandId(),
+                                    p.brandUserId(),
                                     p.brandName(),
 //                                    attachmentUrlService.getAccessUrl(p.thumbnailS3Key()),
                                     p.thumbnailS3Key(),
@@ -95,6 +96,7 @@ private void getReceivedProposal(Long userId, CollaborationType type, ProposalSt
                                         p.campaignId(),
                                         p.proposalId(),
                                         p.brandId(),
+                                        p.brandUserId(),
                                         p.brandName(),
 //                                        attachmentUrlService.getAccessUrl(p.thumbnailS3Key()),
                                         p.thumbnailS3Key(),
@@ -130,6 +132,7 @@ private void getSentProposal(Long userId, CollaborationType type, ProposalStatus
                                         p.campaignId(),
                                         p.proposalId(),
                                         p.brandId(),
+                                        p.brandUserId(),
                                         p.brandName(),
 //                                        attachmentUrlService.getAccessUrl(p.thumbnailS3Key()),
                                         p.thumbnailS3Key(),
@@ -205,6 +208,7 @@ public List<CollaborationResponse> searchMyCollaborations(Long userId, Role role
                         p.campaignId(),
                         p.proposalId(),
                         p.brandId(),
+                        p.brandUserId(),
                         p.brandName(),
                         // attachmentUrlService.getAccessUrl(p.thumbnailS3Key()),
                         p.thumbnailS3Key(),
diff --git a/src/main/java/com/example/RealMatch/business/domain/repository/CampaignApplyRepository.java b/src/main/java/com/example/RealMatch/business/domain/repository/CampaignApplyRepository.java
index d3452c71..938f3679 100644
--- a/src/main/java/com/example/RealMatch/business/domain/repository/CampaignApplyRepository.java
+++ b/src/main/java/com/example/RealMatch/business/domain/repository/CampaignApplyRepository.java
@@ -32,6 +32,7 @@ SELECT ca.campaign.id, COUNT(ca)
                 c.id,
                 null,
                 b.id,
+                b.user.id,
                 b.brandName,
                 b.logoUrl,
                 c.title,
@@ -60,6 +61,7 @@ List<CollaborationProjection> findMyAppliedCollaborations(
                 c.id,
                 null,
                 b.id,
+                b.user.id,
                 b.brandName,
                 b.logoUrl,
                 c.title,
diff --git a/src/main/java/com/example/RealMatch/business/domain/repository/CampaignProposalRepositoryImpl.java b/src/main/java/com/example/RealMatch/business/domain/repository/CampaignProposalRepositoryImpl.java
index 570bd9ea..3ea86bc0 100644
--- a/src/main/java/com/example/RealMatch/business/domain/repository/CampaignProposalRepositoryImpl.java
+++ b/src/main/java/com/example/RealMatch/business/domain/repository/CampaignProposalRepositoryImpl.java
@@ -56,6 +56,7 @@ private List<CollaborationProjection> baseProposalQuery(
                         campaign.id,
                         campaignProposal.id,
                         brand.id,
+                        brand.user.id,
                         brand.brandName,
                         brand.logoUrl,
                         campaignProposal.title,
diff --git a/src/main/java/com/example/RealMatch/business/presentation/dto/response/CollaborationProjection.java b/src/main/java/com/example/RealMatch/business/presentation/dto/response/CollaborationProjection.java
index b04109b1..482fb97b 100644
--- a/src/main/java/com/example/RealMatch/business/presentation/dto/response/CollaborationProjection.java
+++ b/src/main/java/com/example/RealMatch/business/presentation/dto/response/CollaborationProjection.java
@@ -12,6 +12,7 @@ public record CollaborationProjection(
         Long campaignId,
         Long proposalId,
         Long brandId,
+        Long brandUserId,
 
         String brandName,
         String thumbnailS3Key,   // 내부 전용
diff --git a/src/main/java/com/example/RealMatch/business/presentation/dto/response/CollaborationResponse.java b/src/main/java/com/example/RealMatch/business/presentation/dto/response/CollaborationResponse.java
index 5526756c..d48817e1 100644
--- a/src/main/java/com/example/RealMatch/business/presentation/dto/response/CollaborationResponse.java
+++ b/src/main/java/com/example/RealMatch/business/presentation/dto/response/CollaborationResponse.java
@@ -9,6 +9,7 @@ public record CollaborationResponse(
         Long campaignId,           // 캠페인 기반일 때만 채움
         Long proposalId,           // 제안 기반일 때만 채움
         Long brandId,
+        Long brandUserId,
 
         String brandName,
         String thumbnailUrl,