Armando Souza Negreiros (born 10 September 1985) is a freestyle swimmer from Brazil. 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. At the 2004 FINA World Swimming Championships (25 m) in Indianapolis, Negreiros finished 9th in the 400-metre freestyle. At the 2006 FINA World Swimming Championships (25 m) in Shanghai, Negreiros finished 18th in the 400-metre freestyle, and dropped the 1500-metre freestyle.