Seiten Taisei is a Japanese translation of the Chinese phrase Qítiān Dàshèng (齊天大聖) meaning "Great Sage." It may refer to:
- Seiten Taisei, a title given to the hero Sun Wukong in the classic Chinese novel Journey to the West
- Seiten Taisei (manga) (Girls, be ambitious), a 2000 manga by Miki Aihara appearing in the magazine Betsucomi