> For the complete documentation index, see [llms.txt](https://overleaf-pro.ayaka.space/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://overleaf-pro.ayaka.space/latex/ja/to-2/66-i-m-trying-to-include-urls-in-my-.tex-or-.bib-but-i-got-an-error-missing-inserted.md).

# .texや.bibにURLを含めようとしていますが、「Missing $ inserted」というエラーが出ました

URLにアンダースコア文字が含まれている可能性があります `_`、これはLaTeXでは特殊文字です。数式モードでは下付き文字の演算子になります。たとえば `$x_i$` は次のようになります $$x\_i$$。通常、通常のテキストでアンダースコア文字をそのまま使いたい場合は、次のようにエスケープして書く必要があります `\_`.

幸い、アンダースコアを含むURLを含めるもっと簡単な方法があります。 `\usepackage{url}` または `\usepackage{hyperref}` お使いの `\begin{document}`その後は次のように書けます：

```latex
\url{https://www.example.com/url_with_underscore}
```

を文書に記述できます。

詳細は、Overleafのヘルプ記事を参照してください [Missing $ inserted](/latex/ja/latexer/25-missing-inserted.md).


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