He graduated from the Łódź Conservatory in 1937.
He made his debut in 1933, performing Haydn"s 11th Concerto and Camille Saint-Saëns"s Rapsodie d"Auvergne. He took part in the 3rd International Chopin Piano Competition, attracting juror Magda Tagliaferro"s attention. He finished his studies in Paris.
During World World War II he secretly performed banned Polish music in Warsaw.
The precarious circumstances affected Kędra"s hands, but he overcame this. In 1957 he settled in Vienna.
He made many recordings, and died in Warsaw from cancer.