The men's 100 metre breaststroke event at the 2000 Summer Olympics took place on 16–17 September at the Sydney International Aquatic Centre in Sydney, Australia. Domenico Fioravanti made an Olympic milestone to become Italy's first ever gold medalist in swimming. He stormed home on the final lap to establish a new Olympic standard of 1:00.46, cutting off Frédérik Deburghgraeve's 1996 record by 0.14 seconds. U.S. swimmer Ed Moses enjoyed a strong lead on the first length of the pool, but ended up only with a silver in 1:00.73. Meanwhile, Russia's world record holder Roman Sloudnov took the bronze in 1:00.91.