The Budin's chinchilla rat (Abrocoma budini), is a species of chinchilla rat in the family Abrocomidae. Found only in Argentina, the categorization of this species was based on analysis a single specimen. In 2002, Braun and Mares from the University of Oklahoma examined this specimen and confirmed it to be a separate species. The species is named after Emilio Budin, an Argentine specimen collector who worked with Oldfield Thomas.