Sandro Ricardo Rodrigues Viana (born March 26, 1977 in Manaus) is a track and field sprint athlete who competes internationally for Brazil. Viana represented Brazil at the 2008 Summer Olympics in Beijing. He competed at the 100 metres sprint and placed 6th in his heat without advancing to the second round. He ran the distance in a time of 10.60 seconds. Together with José Carlos Moreira, Vicente de Lima and Bruno de Barros he also competed at the 4x100 metres relay. In their qualification heat they placed fourth behind Trinidad and Tobago, Japan and the Netherlands. Their time of 39.01 was the seventh out of sixteen participating nations in the first round and they qualified for the final. There they sprinted to a time of 38.24 seconds, the fourth time after the Jamaican, Trinidad and Japa