diff --git a/app/views/layouts/_header.html.erb b/app/views/layouts/_header.html.erb
index 01edcc44..16c48dfa 100644
--- a/app/views/layouts/_header.html.erb
+++ b/app/views/layouts/_header.html.erb
@@ -8,6 +8,7 @@
       <li class="nav-item"><%= link_to "タグ一覧", tags_path, method: :get, class: "nav-link text-black" %></li>
       <li class="nav-item"><%= link_to "ユーザ一覧", users_path, method: :get, class: "nav-link text-black" %></li>
       <li class="nav-item"><%= link_to "APIトークン一覧", api_tokens_path, method: :get, class: "nav-link text-black" %></li>
+      <li class="nav-item"><%= link_to "APIドキュメント", rswag_ui_path, method: :get, class: "nav-link text-black" %></li>
       <li class="nav-item"><%= link_to "Raskについて(GitHub)", 'https://github.com/nomlab/rask/blob/main/README.md', method: :get, class: "nav-link text-black" %></li>
     </ul>
     <ul class="navbar-nav ms-auto">