The arrival of racist theories in Brazil happened around 1869. The aim of this paper was to demonstrate how those theories got into the psychological sciences and conducted their concepts and practices. Documents from Sao Paulo Eugenic Society's archives (1919) and from the 1st Brazilian Eugenics Conference (1929) have been analyzed, both proving to be committed with the "national race improvement". Many psychologists, psychiatrists and anthropologists related to scientific racism - spread around the world in early 20th century - took part of the institution as well as the conference. This fact brought about the "race psychology" in Brazil, which intended to reduce the psychological knowledge to a hypothetic racial problem.
psychology; race; eugenics