The 1937–38 NBL season was the inaugural season of the National Basketball League (NBL). The league was the evolution of the Midwest Basketball Conference, a league that had a duration of two years before becoming the NBL. The league launched with nine franchises, it was irregular because the teams were the ones that had to choose the day and the hour of the match, even the duration (four quarters of 10 minutes or three parts of 15 minutes) was chosen by the local team before the match. The season ended with the Akron Goodyear Wingfoots becoming the NBL's first championship team.