Baku Yumemakura (夢枕獏, Yumemakura Baku, born 1951 in Odawara, Kanagawa) is a Japanese science fiction and adventure writer. His works have sold more than 20 million copies in Japan spread across more than 280 titles and adapted into a variety of formats including feature films, television shows, movies and comic books.

His works are influenced by outdoor interests such as fishing, particularly Ayu fishing, mountain climbing, canoeing as well as manga, photography, pottery, art, calligraphy, martial arts. He has published a number of photo collections of his journeys through Nepalese mountains.

He is best known for writing Jōgen no Tsuki wo Taberu Shishi (The Lion that Ate the Crescent Moon), which won both the Seiun Award and the Nihon SF Taisho Award. He also has written film scripts, including the one to Onmyōji.

One of his popular martial arts serials that has been adapted into manga is Garōden (餓狼伝), which has also been adapted to two video games and a movie.

He's been nicknamed "the artisan of violence" due to one of his popular martial arts novel series, Shishi no Mon (獅子の門, Gate of Fierce Lions). As of 2014, he has been working on the scripts for the manga series Shin Garōden with renowned manga artist Masami Nobe.

He is also a past president of the Science Fiction and Fantasy Writers of Japan organization.