Oscar Zárate (born 1942) is an Argentine comic book artist and illustrator. Zarate studied architecture and had a successful career in advertising in Argentina. He moved to Europe in 1971 and began to work in earnest as an illustrator. He has drawn for the UK comics magazine Crisis. In the Introducing... and ...For Beginners book series he illustrated texts written by Richard Appignanesi, Alexei Sayle, Dylan Evans, J P McEvoy, Angus Gellatly, Rupert Woodfin and Christopher Marlowe. He is perhaps best known in the United States as the artist for the graphic novel A Small Killing written by Alan Moore, one-shot story about a once idealistic advertising executive haunted by his boyhood self.