Mushishi (蟲師) is a Japanese manga series written and illustrated by Yuki Urushibara. It was serialized in Kodansha's seinen manga magazine Afternoon Season Zōkan from 1999 to 2002, and in Monthly Afternoon from December 2002 to August 2008. The individual chapters were collected and released into ten tankōbon volumes by Kodansha. Those volumes were localized to North America by Del Rey between January 2007 and August 2010. The series follows Ginko, a man who dedicates himself to keeping people protected from supernatural creatures called Mushi.

Mushishi has been adapted into an anime television series by Artland which aired in Fuji Television and BS Fuji between October 2005 and June 2006. It has been licensed by Funimation to its release in North America, while Madman Entertainment and Revelation Films licensed it for Australia and the United Kingdom respectively. A second anime series aired between April and December 2014, which has been licensed in North America by Aniplex of America, with two television specials airing in 2014 and an anime film released in 2015. A live-action film, directed by Katsuhiro Otomo, was released in late 2006. It has also spawned a video game and many types of Mushishi-related merchandise.

The Mushishi manga has been well received both by the public and critics. In Japan, it has frequently ranked in the weekly top ten list of best-selling manga, and the entire series has sold over 3.8 million copies. Both the manga and the anime have received several awards such as the Kodansha Manga Award and the Tokyo Anime Award, and numerous publications have praised them.