Tadeusz Mytnik (born 13 August 1949) is a retired Polish cyclist.

He had his best achievements in the 100 km team time trial.

In this event he won a silver medal at the 1976 Summer Olympics[1] as well as two gold and one bronze medals at the world championships in 1973, 1975 and 1977.

Individually, he won the Tour de Pologne in 1975,[2] Tour of Małopolska in 1978, Flèche d'Or in 1981, and Szlakiem Grodów Piastowskich in 1983.

[4] After retiring from competitions he ran a bicycle shop in Gdynia and organized cycling races.