Maximum the Hormone (マキシマムザホルモン, Makishimamu Za Horumon?) is a Japanese Nu metal band from Hachiōji, Tokyo. Their lineup has consisted of Daisuke-han, Nao, Maximum the Ryo-kun, and Ue-chan since 1999. Each member alternates singing lead vocals, often within the same song, with the exception of Ue-chan, who provides backup vocals almost exclusively.

The group is best known for their unconventional and experimental style of alternative metal music. Over their career, they have found success incorporating elements of heavy metal, hardcore punk, pop, funk, hip hop and ska into their sound. Stylistically, their music runs the gamut from being dark and serious, to ironic or humorous, often with drastic shifts in tempo and mood over the course of a song. Their music videos often have a tongue-in-cheek aspect as well, such as "Rolling1000t00n", which features an underdog (with the requisite karate training montage) facing up to a bully, or "Koi no Mega Lover", which features an awkward young man whose clumsy amorous advances are rejected by a beautiful girl at a party.