Petr Benčík (born 29 January 1976) is a retired Czech professional road cyclist. He represented his nation Czech Republic at the 2008 Summer Olympics, and also claimed three sporting titles in men's road race at the national championships as a full-fledged member of the Czech cycling team.

Bencik made his professional cycling debut in 2000 for the team Wüstenrot ZVVZ. Throughout his career, he captured numerous cup titles in both national and global road cycling tournaments, including his tremendous triumph from the 2006 Memoriał Henryka Łasaka in Poland.

Riding for PSK Whirlpool–Author pro cycling team since 2006, Bencik qualified for the Czech squad, as a 32-year-old, in the men's road race at the 2008 Summer Olympics in Beijing by receiving one half of the nation's two berths from UCI Europe Tour, along with his teammate Roman Kreuziger. He successfully completed a grueling race with a seventy-fifth-place finish through a vast field of nearly a hundred cyclists in 6:39:42. Bencik's official result was later elevated to seventy-fourth position, when Italy's Davide Rebellin had tested positive for CERA that consequently stripped off his Olympic silver medal.