The Avia 57 was a 1930s Czechoslovak 14-passenger commercial transport, designed by Robert Nebesář and built by Avia.

The type was not a success.

[1] The Avia 57 was a three-engined low-wing monoplane that first flew in 1935.

[1] Powered by three Hispano-Suiza 9Vd radial engines, it had landing gear that retracted into the nacelles of the wing-mounted engines.

[1] Data from [1]General characteristics Performance