Biavati made 18 appearances and scored eight goals for the Italy national football team between 1938 and 1947, and he helped the team to win the 1938 FIFA World Cup in France, as well as the third edition of the Central European International Cup. He made his international debut on 12 June 1938, during the quarter-finals of the 1938 World Cup, as Italy defeated the host nation 3–1. Biavati is often remembered for the notable goal he scored against England in Milan, on 13 May 1939, placing the ball into an empty net after dribbling past the English defenders and the goalkeeper.