Mario Díaz was born in Bollullos del Condado, Huelva. He has a degree in Fine Arts from the University of Seville. - He has exhibited all over Spain, Huelva, Seville, La Coruña, Madrid, Barcelona He has works in private collections in Spain, Europe and America, as well as in public bodies such as the Provincial Council and Archbishopric of Huelva, the Faculty of Fine Arts of Seville, the Provincial Council of A Coruña, the Mondariz Foundation, the Council of Brotherhoods and Confraternities and the Education Council of Huelva, etc. He has produced numerous posters for Holy Week, Gloria, Santo Entierro Magno de Huelva, Hermandad Matriz del Rocío de Almonte. He has won several national painting prizes and is awarded a scholarship by the University of Seville for the best record of his promotion.