Altuna began working in the comics world in 1965 for the publisher Editorial Columbia. His first characters were Titan, a Superman-like superhero, Kabul de Bengala (1971, written by Héctor Germán Oesterheld and Armando Fernández among others), Big Norman, Hilario Corvalán and others.
In July 1975, in the daily newspaper El Clarín, Altuna with writer Carlos Trillo created the journalist character Hugo Chávez, better known as El loco Chavez, one of the Argentine's most popular comics strips. Also with Trillo, Altuna drew the series Charlie Moon and Las puertitas del señor López.
In 1982, Altuna moved to Sitges in Spain, drawing stories for the Editorial Toutain and short erotic stories for Playboy. Since February 2005, he has contributed the comic stripFamilia Tipo in the newspaper El Periódico.