Jiří Čadek (7 December 1935 – 20 December 2021) was a Czech footballer who played as a defender.
Čadek played his whole professional career for Dukla Prague. He appeared in 328 league matches, though he never scored a league goal. During his career at Dukla, Čadek won the Czechoslovak First League seven times and the Czechoslovak Cup three times.