diff --git a/src/main/kotlin/dev/usbharu/hideout/core/domain/model/user/User.kt b/src/main/kotlin/dev/usbharu/hideout/core/domain/model/user/User.kt
index bf021757..9666df3e 100644
--- a/src/main/kotlin/dev/usbharu/hideout/core/domain/model/user/User.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/core/domain/model/user/User.kt
@@ -21,18 +21,16 @@ data class User private constructor(
     val createdAt: Instant,
     val keyId: String,
     val followers: String? = null,
-    val following: String? = null
+    val following: String? = null,
+    val instance: Long? = null
 ) {
     override fun toString(): String =
-        "User(id=$id, name='$name', domain='$domain', screenName='$screenName', description='$description'," +
-                " password=$password, inbox='$inbox', outbox='$outbox', url='$url', publicKey='$publicKey'," +
-                " privateKey=$privateKey, createdAt=$createdAt, keyId='$keyId', followers=$followers," +
-                " following=$following)"
+        "User(id=$id, name='$name', domain='$domain', screenName='$screenName', description='$description', password=$password, inbox='$inbox', outbox='$outbox', url='$url', publicKey='$publicKey', privateKey=$privateKey, createdAt=$createdAt, keyId='$keyId', followers=$followers, following=$following, instance=$instance)"
 
     @Component
     class UserBuilder(private val characterLimit: CharacterLimit, private val applicationConfig: ApplicationConfig) {
-        private val logger = LoggerFactory.getLogger(UserBuilder::class.java)
 
+        private val logger = LoggerFactory.getLogger(UserBuilder::class.java)
         @Suppress("LongParameterList", "FunctionMinLength", "LongMethod")
         fun of(
             id: Long,
@@ -49,7 +47,8 @@ data class User private constructor(
             createdAt: Instant,
             keyId: String,
             following: String? = null,
-            followers: String? = null
+            followers: String? = null,
+            instance: Long? = null
         ): User {
             // idは0未満ではいけない
             require(id >= 0) { "id must be greater than or equal to 0." }
@@ -141,7 +140,8 @@ data class User private constructor(
                 createdAt = createdAt,
                 keyId = keyId,
                 followers = followers,
-                following = following
+                following = following,
+                instance = instance
             )
         }
     }
diff --git a/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposed/UserResultRowMapper.kt b/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposed/UserResultRowMapper.kt
index c55a352a..bad247f3 100644
--- a/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposed/UserResultRowMapper.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposed/UserResultRowMapper.kt
@@ -25,7 +25,8 @@ class UserResultRowMapper(private val userBuilder: User.UserBuilder) : ResultRow
             createdAt = Instant.ofEpochMilli((resultRow[Users.createdAt])),
             keyId = resultRow[Users.keyId],
             followers = resultRow[Users.followers],
-            following = resultRow[Users.following]
+            following = resultRow[Users.following],
+            instance = resultRow[Users.instance]
         )
     }
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedquery/FollowerQueryServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedquery/FollowerQueryServiceImpl.kt
index 3034c0cb..4c62003e 100644
--- a/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedquery/FollowerQueryServiceImpl.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedquery/FollowerQueryServiceImpl.kt
@@ -38,7 +38,8 @@ class FollowerQueryServiceImpl(private val userBuilder: User.UserBuilder) : Foll
                 followers[Users.createdAt],
                 followers[Users.keyId],
                 followers[Users.following],
-                followers[Users.followers]
+                followers[Users.followers],
+                followers[Users.instance]
             )
             .select { Users.id eq id }
             .map {
@@ -57,7 +58,8 @@ class FollowerQueryServiceImpl(private val userBuilder: User.UserBuilder) : Foll
                     createdAt = Instant.ofEpochMilli(it[followers[Users.createdAt]]),
                     keyId = it[followers[Users.keyId]],
                     followers = it[followers[Users.followers]],
-                    following = it[followers[Users.following]]
+                    following = it[followers[Users.following]],
+                    instance = it[followers[Users.instance]]
                 )
             }
     }
@@ -89,7 +91,8 @@ class FollowerQueryServiceImpl(private val userBuilder: User.UserBuilder) : Foll
                 followers[Users.createdAt],
                 followers[Users.keyId],
                 followers[Users.following],
-                followers[Users.followers]
+                followers[Users.followers],
+                followers[Users.instance]
             )
             .select { Users.name eq name and (Users.domain eq domain) }
             .map {
@@ -108,7 +111,8 @@ class FollowerQueryServiceImpl(private val userBuilder: User.UserBuilder) : Foll
                     createdAt = Instant.ofEpochMilli(it[followers[Users.createdAt]]),
                     keyId = it[followers[Users.keyId]],
                     followers = it[followers[Users.followers]],
-                    following = it[followers[Users.following]]
+                    following = it[followers[Users.following]],
+                    instance = it[followers[Users.instance]]
                 )
             }
     }
@@ -140,7 +144,8 @@ class FollowerQueryServiceImpl(private val userBuilder: User.UserBuilder) : Foll
                 followers[Users.createdAt],
                 followers[Users.keyId],
                 followers[Users.following],
-                followers[Users.followers]
+                followers[Users.followers],
+                followers[Users.instance]
             )
             .select { followers[Users.id] eq id }
             .map {
@@ -159,7 +164,8 @@ class FollowerQueryServiceImpl(private val userBuilder: User.UserBuilder) : Foll
                     createdAt = Instant.ofEpochMilli(it[followers[Users.createdAt]]),
                     keyId = it[followers[Users.keyId]],
                     followers = it[followers[Users.followers]],
-                    following = it[followers[Users.following]]
+                    following = it[followers[Users.following]],
+                    instance = it[followers[Users.instance]]
                 )
             }
     }
@@ -191,7 +197,8 @@ class FollowerQueryServiceImpl(private val userBuilder: User.UserBuilder) : Foll
                 followers[Users.createdAt],
                 followers[Users.keyId],
                 followers[Users.following],
-                followers[Users.followers]
+                followers[Users.followers],
+                followers[Users.instance]
             )
             .select { followers[Users.name] eq name and (followers[Users.domain] eq domain) }
             .map {
@@ -210,7 +217,8 @@ class FollowerQueryServiceImpl(private val userBuilder: User.UserBuilder) : Foll
                     createdAt = Instant.ofEpochMilli(it[followers[Users.createdAt]]),
                     keyId = it[followers[Users.keyId]],
                     followers = it[followers[Users.followers]],
-                    following = it[followers[Users.following]]
+                    following = it[followers[Users.following]],
+                    instance = it[followers[Users.instance]]
                 )
             }
     }
diff --git a/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedrepository/UserRepositoryImpl.kt b/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedrepository/UserRepositoryImpl.kt
index 6d45a5e7..5cd94ccf 100644
--- a/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedrepository/UserRepositoryImpl.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedrepository/UserRepositoryImpl.kt
@@ -35,6 +35,7 @@ class UserRepositoryImpl(
                 it[keyId] = user.keyId
                 it[following] = user.following
                 it[followers] = user.followers
+                it[instance] = user.instance
             }
         } else {
             Users.update({ Users.id eq user.id }) {
@@ -52,6 +53,7 @@ class UserRepositoryImpl(
                 it[keyId] = user.keyId
                 it[following] = user.following
                 it[followers] = user.followers
+                it[instance] = user.instance
             }
         }
         return user
@@ -98,6 +100,7 @@ object Users : Table("users") {
     val keyId = varchar("key_id", length = 1000)
     val following = varchar("following", length = 1000).nullable()
     val followers = varchar("followers", length = 1000).nullable()
+    val instance = long("instance").references(Instance.id).nullable()
 
     override val primaryKey: PrimaryKey = PrimaryKey(id)
 
diff --git a/src/main/kotlin/dev/usbharu/hideout/core/service/user/UserServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/core/service/user/UserServiceImpl.kt
index 3d486f45..6ee4a53c 100644
--- a/src/main/kotlin/dev/usbharu/hideout/core/service/user/UserServiceImpl.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/core/service/user/UserServiceImpl.kt
@@ -10,6 +10,7 @@ import dev.usbharu.hideout.core.query.UserQueryService
 import dev.usbharu.hideout.core.service.follow.SendFollowDto
 import dev.usbharu.hideout.core.service.instance.InstanceService
 import org.jetbrains.exposed.exceptions.ExposedSQLException
+import org.slf4j.LoggerFactory
 import org.springframework.stereotype.Service
 import java.time.Instant
 
@@ -51,13 +52,19 @@ class UserServiceImpl(
             createdAt = Instant.now(),
             following = "$userUrl/following",
             followers = "$userUrl/followers",
-            keyId = "$userUrl#pubkey"
+            keyId = "$userUrl#pubkey",
+            instance = null
         )
         return userRepository.save(userEntity)
     }
 
     override suspend fun createRemoteUser(user: RemoteUserCreateDto): User {
-        instanceService.fetchInstance(user.url, user.sharedInbox)
+        val instance = try {
+            instanceService.fetchInstance(user.url, user.sharedInbox)
+        } catch (e: Exception) {
+            logger.warn("FAILED to fetch instance. url: {}", user.url, e)
+            null
+        }
 
         val nextId = userRepository.nextId()
         val userEntity = userBuilder.of(
@@ -73,7 +80,8 @@ class UserServiceImpl(
             createdAt = Instant.now(),
             followers = user.followers,
             following = user.following,
-            keyId = user.keyId
+            keyId = user.keyId,
+            instance = instance?.id
         )
         return try {
             userRepository.save(userEntity)
@@ -110,4 +118,8 @@ class UserServiceImpl(
         followerQueryService.removeFollower(id, followerId)
         return false
     }
+
+    companion object {
+        private val logger = LoggerFactory.getLogger(UserServiceImpl::class.java)
+    }
 }