The Eternaut is a science fiction Argentine comic created by Héctor Germán Oesterheld with artwork by Francisco Solano López. It was first published in Hora Cero Semanal between 1957 and 1959. Since its original release it has been hailed as a universal masterpiece of its genre, especially in South America.

Argentine comics are one of the most important comic traditions internationally, and the most important within Latin America, living its "Golden Age" between the 1940s and the 1960s. Soon after, in 1970, the theorist Oscar Masotta synthesized its contributions in the development of their own models of action comics, humor comics and folkloric comics and the presence of other artists.