Gianetti Oliveira de Sena Bonfim (born 13 March 1965) is a Brazilian female former racewalking athlete who competed in the 20 kilometres race walk. Her best for that distance was 1:41:07 hours. She was twice a medallist at the South American Championships in Athletics. She was a seven-time national champion at the Troféu Brasil de Atletismo, winning consecutively from 1996 to 2002. Her son, Caio Bonfim, is also an international racewalker for Brazil.