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+---
+title: 隣接兄弟結合子
+slug: Web/CSS/Adjacent_sibling_combinator
+tags:
+  - CSS
+  - Reference
+  - Selectors
+  - セレクター
+translation_of: Web/CSS/Adjacent_sibling_combinator
+---
+<div>{{CSSRef("Selectors")}}</div>
+
+<p><ruby><strong>隣接兄弟結合子</strong><rp> (</rp><rt>adjacent sibling combinator</rt><rp>)</rp></ruby> (<code>+</code>) は2つのセレクターを接続し、同じ親{{DOMxRef("element", "要素")}}の子同士であって、1つ目の要素の<em>直後</em>にある2つ目の要素を選択します。</p>
+
+<pre class="brush: css no-line-numbers">/* 画像の直後に来る段落 */
+img + p {
+  font-style: bold;
+}</pre>
+
+<h2 id="Syntax" name="Syntax">構文</h2>
+
+<pre class="syntaxbox">直前の要素 + 対象の要素 { <em>スタイルプロパティ</em> }
+</pre>
+
+<h2 id="Example" name="Example">例</h2>
+
+<h3 id="CSS">CSS</h3>
+
+<pre class="brush: css">li:first-of-type + li {
+  color: red;
+}
+</pre>
+
+<h3 id="HTML">HTML</h3>
+
+<pre class="brush: html">&lt;ul&gt;
+  &lt;li&gt;One&lt;/li&gt;
+  &lt;li&gt;Two!&lt;/li&gt;
+  &lt;li&gt;Three&lt;/li&gt;
+&lt;/ul&gt;</pre>
+
+<h3 id="Result">Result</h3>
+
+<p>{{EmbedLiveSample("Example", "100%", 100)}}</p>
+
+<h2 id="Specifications" name="Specifications">仕様書</h2>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="col">仕様書</th>
+   <th scope="col">状態</th>
+   <th scope="col">備考</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td>{{SpecName("CSS4 Selectors", "#adjacent-sibling-combinators", "next-sibling combinator")}}</td>
+   <td>{{Spec2("CSS4 Selectors")}}</td>
+   <td>名前を「次の兄弟」結合子に変更。</td>
+  </tr>
+  <tr>
+   <td>{{SpecName("CSS3 Selectors", "#adjacent-sibling-combinators", "Adjacent sibling combinator")}}</td>
+   <td>{{Spec2("CSS3 Selectors")}}</td>
+   <td> </td>
+  </tr>
+  <tr>
+   <td>{{SpecName("CSS2.1", "selector.html#adjacent-selectors", "Adjacent sibling selectors")}}</td>
+   <td>{{Spec2("CSS2.1")}}</td>
+   <td>初回定義</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility" name="Browser_compatibility">ブラウザーの対応</h2>
+
+<p>{{Compat("css.selectors.adjacent_sibling")}}</p>
+
+<h2 id="See_also" name="See_also">関連情報</h2>
+
+<ul>
+ <li><a href="/ja/docs/Web/CSS/General_sibling_combinator">一般兄弟結合子</a></li>
+</ul>