diff --git a/frontend/src/pages/UserDomain.vue b/frontend/src/pages/UserDomain.vue
index 1a41880..6890950 100644
--- a/frontend/src/pages/UserDomain.vue
+++ b/frontend/src/pages/UserDomain.vue
@@ -36,7 +36,10 @@
                   既定
                 </q-chip>
                 <q-btn flat v-else :loading="activeDomainLoadingId === props.row.id" :disable="deleteDomainLoadingId === props.row.id" @click="activeDomain(props.row)">既定にする</q-btn>
-                <q-btn flat :disable="isNotOwner(props.row.owner.id) || activeDomainLoadingId === props.row.id" :text-color="isNotOwner(props.row.owner.id)?'grey':''" :loading="deleteDomainLoadingId === props.row.id" @click="clickDeleteConfirm(props.row)">削除</q-btn>
+                <q-btn flat :disable="isNotOwner(props.row.owner.id) || activeDomainLoadingId === props.row.id" :text-color="isNotOwner(props.row.owner.id)?'grey':''" :loading="deleteDomainLoadingId === props.row.id" @click="clickDeleteConfirm(props.row)">
+                  <q-tooltip v-if="isNotOwner(props.row.owner.id) || activeDomainLoadingId === props.row.id" :delay="500" self="center middle">ドメイン所有者でないため、操作できません</q-tooltip>
+                  削除
+                </q-btn>
               </q-card-actions>
             </template>
           </domain-card>