diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/media/UploadMediaApplicationService.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/media/UploadMediaApplicationService.kt
index c3b3379a..8f796c7f 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/media/UploadMediaApplicationService.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/media/UploadMediaApplicationService.kt
@@ -58,7 +58,8 @@ class UploadMediaApplicationService(
             type = process.fileType,
             mimeType = process.mimeType,
             blurHash = process.blurHash?.let { MediaBlurHash(it) },
-            description = command.description?.let { MediaDescription(it) }
+            description = command.description?.let { MediaDescription(it) },
+            actorId = principal.actorId
         )
 
         mediaRepository.save(media)
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/post/MediaDetail.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/post/MediaDetail.kt
index 3b99d0d7..e29dac77 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/post/MediaDetail.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/post/MediaDetail.kt
@@ -10,18 +10,20 @@ data class MediaDetail(
     val thumbnailUrl: URI?,
     val sensitive: Boolean,
     val description: String,
-    val blurhash: String
+    val blurhash: String,
+    val actorId: Long
 ) {
     companion object {
         fun of(media: Media): MediaDetail {
             return MediaDetail(
-                media.id.id,
-                media.type.name,
-                media.url,
-                media.thumbnailUrl,
-                false,
-                media.description?.description.orEmpty(),
-                media.blurHash?.hash.orEmpty()
+                mediaId = media.id.id,
+                type = media.type.name,
+                url = media.url,
+                thumbnailUrl = media.thumbnailUrl,
+                sensitive = false,
+                description = media.description?.description.orEmpty(),
+                blurhash = media.blurHash?.hash.orEmpty(),
+                actorId = media.actorId.id
             )
         }
     }
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/media/Media.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/media/Media.kt
index 44c75088..c2d76b56 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/media/Media.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/media/Media.kt
@@ -16,6 +16,7 @@
 
 package dev.usbharu.hideout.core.domain.model.media
 
+import dev.usbharu.hideout.core.domain.model.actor.ActorId
 import java.net.URI
 
 class Media(
@@ -28,6 +29,7 @@ class Media(
     val mimeType: MimeType,
     val blurHash: MediaBlurHash?,
     val description: MediaDescription? = null,
+    val actorId: ActorId,
 ) {
     var url = url
         private set
@@ -35,17 +37,35 @@ class Media(
     fun setUrl(url: URI) {
         this.url = url
     }
+
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as Media
+
+        return id == other.id
+    }
+
+    override fun hashCode(): Int {
+        return id.hashCode()
+    }
+
     override fun toString(): String {
         return "Media(" +
-            "id=$id, " +
-            "name=$name, " +
-            "url=$url, " +
-            "remoteUrl=$remoteUrl, " +
-            "thumbnailUrl=$thumbnailUrl, " +
-            "type=$type, " +
-            "mimeType=$mimeType, " +
-            "blurHash=$blurHash, " +
-            "description=$description" +
-            ")"
+                "id=$id, " +
+                "name=$name, " +
+                "remoteUrl=$remoteUrl, " +
+                "thumbnailUrl=$thumbnailUrl, " +
+                "type=$type, " +
+                "mimeType=$mimeType, " +
+                "blurHash=$blurHash, " +
+                "description=$description, " +
+                "actorId=$actorId, " +
+                "url=$url" +
+                ")"
     }
+
+
 }
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedrepository/MediaRepositoryImpl.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedrepository/MediaRepositoryImpl.kt
index a6ac6b26..d5bd5f2a 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedrepository/MediaRepositoryImpl.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedrepository/MediaRepositoryImpl.kt
@@ -16,6 +16,7 @@
 
 package dev.usbharu.hideout.core.infrastructure.exposedrepository
 
+import dev.usbharu.hideout.core.domain.model.actor.ActorId
 import dev.usbharu.hideout.core.domain.model.media.*
 import org.jetbrains.exposed.sql.*
 import org.jetbrains.exposed.sql.SqlExpressionBuilder.eq
@@ -66,6 +67,7 @@ class MediaRepositoryImpl : MediaRepository, AbstractRepository() {
                 it[blurhash] = media.blurHash?.hash
                 it[mimeType] = media.mimeType.type + "/" + media.mimeType.subtype
                 it[description] = media.description?.description
+                it[actorId] = media.actorId.id
             }
         } else {
             Media.insert {
@@ -78,6 +80,7 @@ class MediaRepositoryImpl : MediaRepository, AbstractRepository() {
                 it[blurhash] = media.blurHash?.hash
                 it[mimeType] = media.mimeType.type + "/" + media.mimeType.subtype
                 it[description] = media.description?.description
+                it[actorId] = media.actorId.id
             }
         }
         return@query media
@@ -100,7 +103,8 @@ fun ResultRow.toMedia(): EntityMedia {
         type = fileType,
         blurHash = this[Media.blurhash]?.let { MediaBlurHash(it) },
         mimeType = MimeType(mimeType.substringBefore("/"), mimeType.substringAfter("/"), fileType),
-        description = this[Media.description]?.let { MediaDescription(it) }
+        description = this[Media.description]?.let { MediaDescription(it) },
+        actorId = ActorId(this[Media.actorId])
     )
 }
 
@@ -114,5 +118,6 @@ object Media : Table("media") {
     val blurhash = varchar("blurhash", 255).nullable()
     val mimeType = varchar("mime_type", 255)
     val description = varchar("description", 4000).nullable()
+    val actorId = long("actor_id").references(Actors.id)
     override val primaryKey = PrimaryKey(id)
 }
diff --git a/hideout-mastodon/src/main/kotlin/dev/usbharu/hideout/mastodon/infrastructure/exposedquery/ExposedStatusQueryService.kt b/hideout-mastodon/src/main/kotlin/dev/usbharu/hideout/mastodon/infrastructure/exposedquery/ExposedStatusQueryService.kt
index 8208256d..f22a0ae0 100644
--- a/hideout-mastodon/src/main/kotlin/dev/usbharu/hideout/mastodon/infrastructure/exposedquery/ExposedStatusQueryService.kt
+++ b/hideout-mastodon/src/main/kotlin/dev/usbharu/hideout/mastodon/infrastructure/exposedquery/ExposedStatusQueryService.kt
@@ -16,6 +16,7 @@
 
 package dev.usbharu.hideout.mastodon.infrastructure.exposedquery
 
+import dev.usbharu.hideout.core.domain.model.actor.ActorId
 import dev.usbharu.hideout.core.domain.model.emoji.CustomEmoji
 import dev.usbharu.hideout.core.domain.model.media.*
 import dev.usbharu.hideout.core.domain.model.post.Visibility
@@ -284,7 +285,8 @@ fun ResultRow.toMedia(): EntityMedia {
         type = fileType,
         blurHash = this[Media.blurhash]?.let { MediaBlurHash(it) },
         mimeType = MimeType(mimeType.substringBefore("/"), mimeType.substringAfter("/"), fileType),
-        description = this[Media.description]?.let { MediaDescription(it) }
+        description = this[Media.description]?.let { MediaDescription(it) },
+        actorId = ActorId(this[Media.actorId])
     )
 }
 
@@ -300,7 +302,8 @@ fun ResultRow.toMediaOrNull(): EntityMedia? {
         type = FileType.valueOf(this[Media.type]),
         blurHash = this[Media.blurhash]?.let { MediaBlurHash(it) },
         mimeType = MimeType(mimeType.substringBefore("/"), mimeType.substringAfter("/"), fileType),
-        description = this[Media.description]?.let { MediaDescription(it) }
+        description = this[Media.description]?.let { MediaDescription(it) },
+        actorId = ActorId(this[Media.actorId])
     )
 }