diff --git a/src/main/java/com/example/gp_backend_data/space/domain/dto/request/SpaceUpdateRequest.java b/src/main/java/com/example/gp_backend_data/space/domain/dto/request/SpaceUpdateRequest.java
index abc98dd..43d458d 100644
--- a/src/main/java/com/example/gp_backend_data/space/domain/dto/request/SpaceUpdateRequest.java
+++ b/src/main/java/com/example/gp_backend_data/space/domain/dto/request/SpaceUpdateRequest.java
@@ -11,5 +11,5 @@
 @AllArgsConstructor
 public class SpaceUpdateRequest {
     private String title;
-
+    private Boolean isShared;
 }
diff --git a/src/main/java/com/example/gp_backend_data/space/domain/dto/response/SpaceResponse.java b/src/main/java/com/example/gp_backend_data/space/domain/dto/response/SpaceResponse.java
index 99b8396..cdde1ab 100644
--- a/src/main/java/com/example/gp_backend_data/space/domain/dto/response/SpaceResponse.java
+++ b/src/main/java/com/example/gp_backend_data/space/domain/dto/response/SpaceResponse.java
@@ -1,5 +1,6 @@
 package com.example.gp_backend_data.space.domain.dto.response;
 
+import com.fasterxml.jackson.annotation.JsonProperty;
 import lombok.*;
 
 import java.time.LocalDateTime;
@@ -15,4 +16,7 @@ public class SpaceResponse {
     private String title;
     private LocalDateTime createdAt;
     private LocalDateTime lastVisitedAt;
+    @JsonProperty("isShared")
+    private boolean isShared;
+    private UUID sharingId;
 }
diff --git a/src/main/java/com/example/gp_backend_data/space/domain/entity/Space.java b/src/main/java/com/example/gp_backend_data/space/domain/entity/Space.java
index 6930322..e229e5e 100644
--- a/src/main/java/com/example/gp_backend_data/space/domain/entity/Space.java
+++ b/src/main/java/com/example/gp_backend_data/space/domain/entity/Space.java
@@ -1,10 +1,10 @@
 package com.example.gp_backend_data.space.domain.entity;
 
+import com.example.gp_backend_data.utils.UUIDHelper;
 import jakarta.persistence.*;
 import lombok.*;
+import org.hibernate.annotations.ColumnDefault;
 import org.hibernate.annotations.CreationTimestamp;
-import org.hibernate.annotations.JdbcTypeCode;
-import org.hibernate.type.SqlTypes;
 
 import java.time.LocalDateTime;
 import java.util.UUID;
@@ -36,8 +36,27 @@ public class Space {
     @Column(name = "last_visited_at", nullable = false)
     private LocalDateTime lastVisitedAt;
 
+    @Column(name = "is_shared", nullable = false)
+    @ColumnDefault("false")
+    @Builder.Default
+    private boolean isShared = false;
+
+    @Column(name = "sharing_id", nullable = true, unique = true)
+    private byte[] sharingId;
+
     public void updateTitle(String title) {
         this.title = title;
         this.lastVisitedAt = LocalDateTime.now();
     }
+
+    public void updateSharingStatusWithId(boolean isShared, UUIDHelper uuidHelper) {
+        this.isShared = isShared;
+        this.lastVisitedAt = LocalDateTime.now();
+
+        if (isShared && this.sharingId == null) {
+            this.sharingId = uuidHelper.convertUUIDToByteArray(UUID.randomUUID());
+        } else if (!isShared) {
+            this.sharingId = null;
+        }
+    }
 }
diff --git a/src/main/java/com/example/gp_backend_data/space/service/SpaceService.java b/src/main/java/com/example/gp_backend_data/space/service/SpaceService.java
index 325c40d..87a0eac 100644
--- a/src/main/java/com/example/gp_backend_data/space/service/SpaceService.java
+++ b/src/main/java/com/example/gp_backend_data/space/service/SpaceService.java
@@ -52,6 +52,8 @@ public List<SpaceResponse> getSpaces(UUID userId, String sortBy){
                         .title(space.getTitle())
                         .createdAt(space.getCreatedAt())
                         .lastVisitedAt(space.getLastVisitedAt())
+                        .isShared(space.isShared())
+                        .sharingId(uuidHelper.convertByteArrayToUUID(space.getSharingId()))
                         .build())
                 .toList();
     }
@@ -61,7 +63,15 @@ public SpaceResponse updateSpace(UUID userId, UUID spaceId, SpaceUpdateRequest r
         Space space = spaceRepository.findBySpaceIdAndUserId(uuidHelper.convertUUIDToByteArray(spaceId), uuidHelper.convertUUIDToByteArray(userId))
                 .orElseThrow(() -> new RuntimeException("Space not found"));
 
-        space.updateTitle(request.getTitle());
+        if (request.getTitle() != null) {
+            space.updateTitle(request.getTitle());
+        }
+        
+        if (request.getIsShared() != null) {
+            // `isShared` 여부에 따라 sharingId 자동 할당됨
+            space.updateSharingStatusWithId(request.getIsShared(), uuidHelper);
+        }
+        
         space = spaceRepository.saveAndFlush(space);
 
         return SpaceResponse.builder()
@@ -69,6 +79,8 @@ public SpaceResponse updateSpace(UUID userId, UUID spaceId, SpaceUpdateRequest r
                 .title(space.getTitle())
                 .createdAt(space.getCreatedAt())
                 .lastVisitedAt(space.getLastVisitedAt())
+                .isShared(space.isShared())
+                .sharingId(uuidHelper.convertByteArrayToUUID(space.getSharingId()))
                 .build();
     }
 
diff --git a/src/main/java/com/example/gp_backend_data/utils/UUIDHelper.java b/src/main/java/com/example/gp_backend_data/utils/UUIDHelper.java
index 2da7b33..733884d 100644
--- a/src/main/java/com/example/gp_backend_data/utils/UUIDHelper.java
+++ b/src/main/java/com/example/gp_backend_data/utils/UUIDHelper.java
@@ -8,6 +8,10 @@
 @Component
 public class UUIDHelper {
     public byte[] convertUUIDToByteArray(UUID uuid) {
+        if (uuid == null) {
+            return null;
+        }
+
         ByteBuffer bb = ByteBuffer.wrap(new byte[16]);
         bb.putLong(uuid.getMostSignificantBits());
         bb.putLong(uuid.getLeastSignificantBits());
@@ -15,6 +19,10 @@ public byte[] convertUUIDToByteArray(UUID uuid) {
     }
 
     public UUID convertByteArrayToUUID(byte[] bytes) {
+        if (bytes == null) {
+            return null;
+        }
+
         ByteBuffer byteBuffer = ByteBuffer.wrap(bytes);
         long high = byteBuffer.getLong();
         long low = byteBuffer.getLong();