Chainsaw Man (Japanese: チェンソーマン, Hepburn: Chensō Man) is a Japanese manga series written and illustrated by Tatsuki Fujimoto. Its first arc was serialized in Shueisha’s shōnen manga magazine Weekly Shōnen Jump from December 2018 to December 2020; its second arc began serialization in Shueisha’s Shōnen Jump+ online magazine in July 2022. Its chapters have been collected in 15 tankōbon volumes as of August 2023.

Chainsaw Man follows the story of Denji, an impoverished young man who makes a contract that fuses his body with that of a dog-like devil named Pochita, granting him the ability to transform parts of his body into chainsaws. Denji eventually joins the Public Safety Devil Hunters, a government agency focused on fighting against devils whenever they become a threat to Japan. The second arc of the story focuses on Asa Mitaka, a high school student who enters into a contract with Yoru, the War Devil, who forces her to hunt down Chainsaw Man in order to reclaim the devils stolen from her.

In North America, the manga is licensed in English by Viz Media, for both print and digital release, and it is also published by Shueisha on the Manga Plus online platform. An anime television series adaptation produced by MAPPA was broadcast from October to December 2022.

By August 2023, the manga had over 26 million copies in circulation, making it one of the best-selling manga series. In 2021, it won the 66th Shogakukan Manga Award in the shōnen category and won the Harvey Awards in the Best Manga category in 2021 and 2022. Chainsaw Man has been overall well received by critics, who have commended its storytelling, characters, dark humor, and have particularly highlighted its violent scenes within the context of the story.