diff --git a/app/src/main/java/jp/juggler/subwaytooter/DlgContextMenu.kt b/app/src/main/java/jp/juggler/subwaytooter/DlgContextMenu.kt
index 21f69c94..b802eb13 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/DlgContextMenu.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/DlgContextMenu.kt
@@ -117,7 +117,7 @@ internal class DlgContextMenu(
 		val btnAroundLTL : View = viewRoot.findViewById(R.id.btnAroundLTL)
 		val btnAroundFTL : View = viewRoot.findViewById(R.id.btnAroundFTL)
 		val btnCopyAccountId : Button = viewRoot.findViewById(R.id.btnCopyAccountId)
-		
+		val btnOpenAccountInAdminWebUi :Button = viewRoot.findViewById(R.id.btnOpenAccountInAdminWebUi)
 		val llLinks : LinearLayout = viewRoot.findViewById(R.id.llLinks)
 		
 		btnAroundAccountTL.setOnClickListener(this)
@@ -162,6 +162,7 @@ internal class DlgContextMenu(
 		btnDomainBlock.setOnClickListener(this)
 		btnEndorse.setOnClickListener(this)
 		btnCopyAccountId.setOnClickListener(this)
+		btnOpenAccountInAdminWebUi.setOnClickListener(this)
 		
 		viewRoot.findViewById<View>(R.id.btnQuoteUrlStatus).setOnClickListener(this)
 		viewRoot.findViewById<View>(R.id.btnQuoteUrlAccount).setOnClickListener(this)
@@ -355,6 +356,7 @@ internal class DlgContextMenu(
 			btnInstanceInformation.visibility = View.GONE
 			btnDomainBlock.visibility = View.GONE
 			btnCopyAccountId.visibility = View.GONE
+			btnOpenAccountInAdminWebUi.visibility = View.GONE
 		} else {
 			val who_host = who.host
 			btnInstanceInformation.visibility = View.VISIBLE
@@ -371,6 +373,9 @@ internal class DlgContextMenu(
 			
 			btnCopyAccountId.visibility = View.VISIBLE
 			btnCopyAccountId.text = activity.getString(R.string.copy_account_id, who.id.toString() )
+			
+			vg( btnOpenAccountInAdminWebUi , ! access_info.isPseudo)
+			
 		}
 		
 		viewRoot.findViewById<View>(R.id.btnAccountText).setOnClickListener(this)
@@ -755,6 +760,8 @@ internal class DlgContextMenu(
 				)
 				
 				R.id.btnCopyAccountId -> who.id.toString().copyToClipboard(activity)
+				
+				R.id.btnOpenAccountInAdminWebUi -> App1.openBrowser(activity,"https://${access_info.host}/admin/accounts/${who.id}")
 			}
 		}
 		
diff --git a/app/src/main/res/layout/dlg_context_menu.xml b/app/src/main/res/layout/dlg_context_menu.xml
index 06abe2e2..dd1e3539 100644
--- a/app/src/main/res/layout/dlg_context_menu.xml
+++ b/app/src/main/res/layout/dlg_context_menu.xml
@@ -772,7 +772,20 @@
 
                     android:textAllCaps="false"
                     />
-
+                <Button
+                    android:id="@+id/btnOpenAccountInAdminWebUi"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:background="@drawable/btn_bg_transparent"
+                    android:gravity="start|center_vertical"
+                    android:minHeight="32dp"
+                    android:paddingBottom="4dp"
+                    android:paddingEnd="8dp"
+                    android:paddingStart="8dp"
+                    android:paddingTop="4dp"
+                    android:text="@string/open_in_admin_ui"
+                    android:textAllCaps="false"
+                    />
 
                 <Button
                     android:id="@+id/btnAccountQrCode"
diff --git a/app/src/main/res/values-ja/strings.xml b/app/src/main/res/values-ja/strings.xml
index 7058e7a6..c3d77eab 100644
--- a/app/src/main/res/values-ja/strings.xml
+++ b/app/src/main/res/values-ja/strings.xml
@@ -847,5 +847,6 @@
     <string name="scheduled_status_requires_mastodon_2_7_0">予約投稿はマストドン2.7.0以降で使えます</string>
     <string name="move_notifications_quick_filter_to_column_setting">通知カラムのクイックフィルタをカラム設定内部に表示する(アプリ再起動が必要)</string>
     <string name="copy_account_id">アカウントID %1$s をコピー</string>
+    <string name="open_in_admin_ui">管理者WebUIで開く</string>
 
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index d9805b2d..a6e4d77c 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -868,5 +868,6 @@
     <string name="scheduled_status_requires_mastodon_2_7_0">Scheduled status requires Mastodon 2.7.0 or later.</string>
     <string name="move_notifications_quick_filter_to_column_setting">Show notifications quick filter in column setting (app restart required)</string>
     <string name="copy_account_id">Copy account ID %1$s</string>
+    <string name="open_in_admin_ui">Open in admin web UI</string>
 
 </resources>
\ No newline at end of file