Das Pastoras is the pen name of Spanish comic artist Julio Martínez Pérez. Born in Santa Eugenia de Riveira, Galicia, he was first published the Catalan fanzine Zero.
Soon after, he began to be published in Spanish comic magazines like Comix Internacional and Zona 84.
He is perhaps best known from his work in French comics, such as his mythological series Les Hérésiarques (2002) and Catsaka, a new cycle of Alejandro Jodorowsky's Metabarons saga.
Since the late 2000s, Pastoras has provided artwork to the one shots Wolverine: Switchback, Wolverine: Revolver, Thor: God of Thunder for Marvel, and has worked on the Valiant titles X-O Manowar: Dead Hand, Book of Death: Fall of Ninjak, and Bloodshot Reborn.