The Serie B 1956–57 was the twenty-fifth tournament of this competition played in Italy since its creation.
Teams Venezia and Sambenedettese had been promoted from Serie C, while Novara and Pro Patria had been relegated from Serie A.
Final classification
Results
Promotion tie-breaker
Alessandria promoted to Serie A.
References and sources Almanacco Illustrato del Calcio - La Storia 1898-2004, Panini Edizioni, Modena, September 2005