GReeeeN是日本的4人组创作乐团。2007年出道时，全部团员就读于福岛县奥**学的牙医学系。目前所有团员皆已通过国家考试并取得牙医执照。

「GReeeeN」 是由「Green Boy」这个字衍生出来的。「Green Boy」有「新人」、「未成熟」的意思。根据成员HIDE在2009年3月8日BLOG中的解释，GReeeeN的意思是「尚未完成所以会继续下去，蕴藏有未知的可能性」。

「GReeeeN」中的4个小写的「e」则代表成员人数。而且成员都是牙医学系出身，这亦代表笑的时候能够看见牙齿，表达出成员「希望能传达微笑（grin）」的意念。

Greeeen (stylized as GReeeeN) is a Japanese pop rock/hip hop/breakbeat vocal group from Kōriyama in Fukushima Prefecture, comprising the all-male four members Hide, Navi, Kuni (written as "92"), and Soh. They made their debut with Universal Music in 2007. Their logo image is of a mouthful of teeth, and the four Es indicate the number of members. The sound production is handled by Hide's older brother JIN, a former guitarist of Pay money To my Pain. According to their website at Universal Music Japan, their catch phrase is "Rock 'n' Breakbeats with Four Microphones".