František Janda-Suk (, 25 March 1878 – 23 June 1955) was a Czech athlete who competed for Bohemia in the 1900 Summer Olympics and in the 1912 Summer Olympics and Czechoslovakia at the 1924 Summer Olympics. He was born in Postřižín near Roudnice nad Labem and died in Prague. In the 1900 Summer Olympics held in Paris, France, where he won the silver medal in the discus throw. He - and the Hungarian Rudolf Bauer - was the first modern athlete to throw the discus while rotating the whole body. He invented this technique when studying the position of the famous statue of Discobolus. After only one year of developing the technique he gained the olympic silver. At the 1912 Summer Olympics in Stockholm, Sweden he was 15th in shot put and 17th in discus throw.