Hansen was a player of great stamina and positional sense with good technique, and his game was riskless without surprise or use of trickery, but also without mistakes. He made his debut for the senior Danish national team in a friendly match against the West Germany national football team on September 24, 1958. On September 23, 1959, Hansen scored his only international goal, as Denmark drew the Czechoslovakia national football team 2-2 in a qualification game for the 1960 European Nations' Cup. At the 1960 Olympics, he played in the position of right halfback on the Danish team, often linking up via short passes with right winger Poul Pedersen. Hansen played all five games as Denmark won silver medals, losing to the Yugoslavia national football team in the final. Many of his Danish teammates moved abroad to play professionally during the 1960s, and was thereby banned from the amateur-only national team. Hansen and fellow Danish international Henning Enoksen were offered a professional contract with Torino Calcio, but Enoksen declined and both offers were withdrawn. Hansen stayed an amateur, and played both games, as the Danish team finished fourth at the 1964 European Nations' Cup. On November 29, 1964, he broke Poul Pedersen's record as he became the first Dane to play 51 games for the national team. Bent Hansen ended his international career in October 1965, having played 58 international games; a record that was eventually broken by Henning Munk Jensen in May 1978.