diff --git a/src/routes/(DefaultStyle)/post/[slug]/toc.svelte b/src/routes/(DefaultStyle)/post/[slug]/toc.svelte
index 784c033..e903b1e 100644
--- a/src/routes/(DefaultStyle)/post/[slug]/toc.svelte
+++ b/src/routes/(DefaultStyle)/post/[slug]/toc.svelte
@@ -8,7 +8,9 @@
     <div style="margin:4px 0 0 8px;color:#aaaa;font-size:0.85em;">目次</div>
     <ul>
         {#each toclist as toc}
-            <li><a href='#{toc.id}'>{toc.title}</a></li>
+            {#if toc.depth < 4}
+                <li><a href='#{toc.id}'>{toc.title}</a></li>
+            {/if}
         {/each}
     </ul>
 </nav>