Blue Exorcist (青の祓魔師（エクソシスト）, Ao no Ekusoshisuto^?, Ao no Exorcist) is a manga written and illustrated by Kazue Katō. The manga has been serialized in Jump Square magazine by Shueisha since April 2009, with individual chapters collected into six tankōbon volumes as of April 4, 2011. The one-shot of the manga was first featured in the September 2008 issue of Jump Square and was titled Miyamauguisu House Case (深山鶯邸事件, Miyamauguisu-tei Jiken^?). As of December 17, 2011, 30 chapters have been released in Japan. It was adapted into an anime television series and it will be adapted into an anime film.

Viz Media has licensed the manga for North American production, with the first volume released in April 5, 2011 and the fifth volume scheduled for release in December 6, 2011. The North American book distributor Simon & Schuster listed the first volume of Kazue Kato's Blue Exorcist manga for release by Viz Media this April 2011.

The story revolves around Rin Okumura, a teenager possessing abnormal strength and endurance who, along with his younger twin brother Yukio, was raised by Father Shiro Fujimoto. Soon after Yukio departs to study at the prestigious True Cross Academy, Rin learns that he is the son of Satan, the strongest of all demons. Witnessing Shiro dying to protect him, Rin ends up doing what his guardian asked him never to do: draw the demon-slaying blade Kurikara, which restrains his demonic powers, from its scabbard. From that moment on, Rin not only gains permanent demonic features like fangs, pointed ears, fiery "horns" and a tail, but also the power to ignite himself into blue flames that can destroy almost anything they touch.