Armando Souza Negreiros (born 10 September 1985) is a freestyle swimmer from Brazil.

[1] In 2003, he reached the required rate to compete in the 800-metre freestyle at the 2003 Pan American Games in Santo Domingo, but the race was excluded from the calendar.

[1] At the 2004 FINA World Swimming Championships (25 m) in Indianapolis, Negreiros finished 9th in the 400-metre freestyle.

[1] Negreiros was at the 2007 Pan American Games in Rio de Janeiro, where he won the bronze medal in the 400-metre freestyle, beating the Brazilian record with a time of 3:51.18.

[14] On 18 July 2009, he broke the short-course South American record in the 800-metre freestyle, with a time of 7:43.52, at the Rio de Janeiro's State Winter Championships.