Bessatsu Shōnen Magazine is a Japanese monthly manga magazine published by Kōdansha. The magazine was started in September 2009 as a spin-off of another Kōdansha magazine, Weekly Shōnen Magazine.

Kodansha Ltd. is a Japanese privately held publishing company headquartered in Bunkyō, Tokyo. Kodansha publishes the manga magazines Nakayoshi, Afternoon, Evening, Weekly Shōnen Magazine, and Bessatsu Shōnen Magazine, as well as the more literary magazines Gunzō, Shūkan Gendai, and the Japanese dictionary Nihongo Daijiten. Kodansha was founded by Seiji Noma in 1910, and members of his family continue as its owners either directly or through the Noma Cultural Foundation.