José Sylvio Fiolo (born March 2, 1950, in Campinas) is a former international breaststroke swimmer from Brazil.

[1] Fiolo participated for his native country at three consecutive Summer Olympics: 1968 Mexico City, 1972 Munich and 1976 Montreal.

[2][3] His greatest achievement occurred on February 19, 1968, at age 17, when, alone in the pool but in front of a crowd in the stands of the Clube de Regatas Guanabara, in Rio de Janeiro – the same place and the same way as Manuel dos Santos broke seven years before the world record of 100-metre freestyle – he established the World Record for the 100-metre breaststroke race, with a time of 1:06.4.

[7] At the 1971 Pan American Games in Cali, Fiolo won two bronze medals in the 100-metre breaststroke and 4×100-metre medley events.

[10] At the 1975 Pan American Games in Mexico City, Fiolo won two bronze medals in the 100-metre breaststroke and 4×100-metre medley events.