diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/actor/ActorDetail.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/actor/ActorDetail.kt
new file mode 100644
index 00000000..3398d719
--- /dev/null
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/actor/ActorDetail.kt
@@ -0,0 +1,38 @@
+package dev.usbharu.hideout.core.application.actor
+
+import dev.usbharu.hideout.core.domain.model.actor.Actor
+import java.net.URI
+
+data class ActorDetail(
+    val id: Long,
+    val name: String,
+    val screenName: String,
+    val host: String,
+    val remoteUrl: String?,
+    val locked: Boolean,
+    val description: String,
+    val postsCount: Int,
+    val iconUrl: URI?,
+    val bannerURL: URI?,
+    val followingCount: Int?,
+    val followersCount: Int?
+) {
+    companion object {
+        fun of(actor: Actor, iconUrl: URI?, bannerURL: URI?): ActorDetail {
+            return ActorDetail(
+                id = actor.id.id,
+                name = actor.name.name,
+                screenName = actor.screenName.screenName,
+                host = actor.url.host,
+                remoteUrl = actor.url.toString(),
+                locked = actor.locked,
+                description = actor.description.description,
+                postsCount = actor.postsCount.postsCount,
+                iconUrl = iconUrl,
+                bannerURL = bannerURL,
+                followingCount = actor.followingCount?.relationshipCount,
+                followersCount = actor.followersCount?.relationshipCount
+            )
+        }
+    }
+}
\ No newline at end of file
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/actor/GetActorDetail.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/actor/GetActorDetail.kt
new file mode 100644
index 00000000..8089a404
--- /dev/null
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/actor/GetActorDetail.kt
@@ -0,0 +1,8 @@
+package dev.usbharu.hideout.core.application.actor
+
+import dev.usbharu.hideout.core.domain.model.support.acct.Acct
+
+data class GetActorDetail(
+    val actorName: Acct? = null,
+    val id: Long? = null
+)
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/actor/GetActorDetailApplicationService.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/actor/GetActorDetailApplicationService.kt
new file mode 100644
index 00000000..f417fe5d
--- /dev/null
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/actor/GetActorDetailApplicationService.kt
@@ -0,0 +1,49 @@
+package dev.usbharu.hideout.core.application.actor
+
+import dev.usbharu.hideout.core.application.shared.AbstractApplicationService
+import dev.usbharu.hideout.core.application.shared.Transaction
+import dev.usbharu.hideout.core.config.ApplicationConfig
+import dev.usbharu.hideout.core.domain.model.actor.ActorId
+import dev.usbharu.hideout.core.domain.model.actor.ActorRepository
+import dev.usbharu.hideout.core.domain.model.media.MediaRepository
+import dev.usbharu.hideout.core.domain.model.support.principal.Principal
+import org.slf4j.LoggerFactory
+import org.springframework.stereotype.Component
+
+@Component
+class GetActorDetailApplicationService(
+    private val actorRepository: ActorRepository,
+    private val mediaRepository: MediaRepository,
+    private val applicationConfig: ApplicationConfig,
+    transaction: Transaction
+) :
+    AbstractApplicationService<GetActorDetail, ActorDetail>(
+        transaction, logger
+    ) {
+    override suspend fun internalExecute(command: GetActorDetail, principal: Principal): ActorDetail {
+        val actor = if (command.id != null) {
+            actorRepository.findById(ActorId(command.id))
+                ?: throw IllegalArgumentException("Actor ${command.id} not found.")
+        } else if (command.actorName != null) {
+
+            val host = if (command.actorName.host.isEmpty()) {
+                applicationConfig.url.host
+            } else {
+                command.actorName.host
+            }
+            actorRepository.findByNameAndDomain(command.actorName.userpart, host)
+                ?: throw IllegalArgumentException("Actor ${command.actorName} not found.")
+        } else {
+            throw IllegalArgumentException("id and actorName are null.")
+        }
+
+        val iconUrl = actor.icon?.let { mediaRepository.findById(it)?.url }
+        val bannerUrl = actor.banner?.let { mediaRepository.findById(it)?.url }
+
+        return ActorDetail.of(actor, iconUrl, bannerUrl)
+    }
+
+    companion object {
+        private val logger = LoggerFactory.getLogger(GetActorDetailApplicationService::class.java)
+    }
+}
\ No newline at end of file
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/config/SecurityConfig.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/config/SecurityConfig.kt
index 2eccad56..2c8217d3 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/config/SecurityConfig.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/config/SecurityConfig.kt
@@ -87,6 +87,7 @@ class SecurityConfig {
                 authorize(GET, "/auth/sign_up", hasRole("ANONYMOUS"))
                 authorize(POST, "/auth/sign_up", permitAll)
                 authorize(GET, "/users/{username}/posts/{postId}", permitAll)
+                authorize(GET, "/users/{userid}", permitAll)
                 authorize(GET, "/files/*", permitAll)
                 authorize(POST, "/publish", authenticated)
                 authorize(GET, "/publish", authenticated)
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/support/acct/Acct.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/support/acct/Acct.kt
index 8be92e3a..148e01ca 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/support/acct/Acct.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/support/acct/Acct.kt
@@ -5,4 +5,14 @@ data class Acct(
     val host: String
 ) {
     override fun toString(): String = "acct:$userpart@$host"
+
+    companion object {
+
+        fun of(acct: String): Acct {
+            return Acct(
+                acct.substringBeforeLast('@'),
+                acct.substringAfterLast('@', "")
+            )
+        }
+    }
 }
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/interfaces/web/user/UserController.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/interfaces/web/user/UserController.kt
new file mode 100644
index 00000000..d07a79ea
--- /dev/null
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/interfaces/web/user/UserController.kt
@@ -0,0 +1,31 @@
+package dev.usbharu.hideout.core.interfaces.web.user
+
+import dev.usbharu.hideout.core.application.actor.GetActorDetail
+import dev.usbharu.hideout.core.application.actor.GetActorDetailApplicationService
+import dev.usbharu.hideout.core.application.instance.GetLocalInstanceApplicationService
+import dev.usbharu.hideout.core.domain.model.support.acct.Acct
+import dev.usbharu.hideout.core.domain.model.support.principal.Anonymous
+import dev.usbharu.hideout.core.infrastructure.springframework.SpringSecurityFormLoginPrincipalContextHolder
+import org.springframework.stereotype.Controller
+import org.springframework.ui.Model
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.PathVariable
+
+@Controller
+class UserController(
+    private val getLocalInstanceApplicationService: GetLocalInstanceApplicationService,
+    private val getUserDetailApplicationService: GetActorDetailApplicationService,
+    private val springSecurityFormLoginPrincipalContextHolder: SpringSecurityFormLoginPrincipalContextHolder,
+) {
+    @GetMapping("/users/{name}")
+    suspend fun userById(@PathVariable name: String, model: Model): String {
+        val principal = springSecurityFormLoginPrincipalContextHolder.getPrincipal()
+
+        model.addAttribute("instance", getLocalInstanceApplicationService.execute(Unit, Anonymous))
+        model.addAttribute(
+            "user",
+            getUserDetailApplicationService.execute(GetActorDetail(Acct.of(name)), principal)
+        )
+        return "userById"
+    }
+}
\ No newline at end of file
diff --git a/hideout-core/src/main/resources/messages/hideout-web-messages.properties b/hideout-core/src/main/resources/messages/hideout-web-messages.properties
index 6a47f1b5..6423f1c9 100644
--- a/hideout-core/src/main/resources/messages/hideout-web-messages.properties
+++ b/hideout-core/src/main/resources/messages/hideout-web-messages.properties
@@ -21,4 +21,5 @@ post-form.new-posts-cw-title=\u30B3\u30F3\u30C6\u30F3\u30C4\u306B\u95B2\u89A7\u6
 post-form.new-posts-form-label=\u4ECA\u306A\u306B\u3057\u3066\u308B?
 post-form.new-posts-submit=\u6295\u7A3F\u3059\u308B
 post.repost=\u30EA\u30DD\u30B9\u30C8
-post.repost-by={0}\u304C\u30EA\u30DD\u30B9\u30C8
\ No newline at end of file
+post.repost-by={0}\u304C\u30EA\u30DD\u30B9\u30C8
+user-by-id.title={0} \u3055\u3093 - {1}
\ No newline at end of file
diff --git a/hideout-core/src/main/resources/messages/hideout-web-messages_ja_JP.properties b/hideout-core/src/main/resources/messages/hideout-web-messages_ja_JP.properties
index 6a47f1b5..6423f1c9 100644
--- a/hideout-core/src/main/resources/messages/hideout-web-messages_ja_JP.properties
+++ b/hideout-core/src/main/resources/messages/hideout-web-messages_ja_JP.properties
@@ -21,4 +21,5 @@ post-form.new-posts-cw-title=\u30B3\u30F3\u30C6\u30F3\u30C4\u306B\u95B2\u89A7\u6
 post-form.new-posts-form-label=\u4ECA\u306A\u306B\u3057\u3066\u308B?
 post-form.new-posts-submit=\u6295\u7A3F\u3059\u308B
 post.repost=\u30EA\u30DD\u30B9\u30C8
-post.repost-by={0}\u304C\u30EA\u30DD\u30B9\u30C8
\ No newline at end of file
+post.repost-by={0}\u304C\u30EA\u30DD\u30B9\u30C8
+user-by-id.title={0} \u3055\u3093 - {1}
\ No newline at end of file
diff --git a/hideout-core/src/main/resources/templates/userById.html b/hideout-core/src/main/resources/templates/userById.html
new file mode 100644
index 00000000..ded4a2a7
--- /dev/null
+++ b/hideout-core/src/main/resources/templates/userById.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en" xmlns:th="http://www.thymeleaf.org">
+<head>
+    <meta charset="UTF-8">
+    <title th:text="#{user-by-id.title(${user.screenName},${instance.name})}">User - hideout</title>
+</head>
+<body>
+<noscript>
+    <div>
+        <img th:src="user.icon">
+    </div>
+</noscript>
+</body>
+</html>
\ No newline at end of file