All Swedish male and female elite basketball players were interviewed concerning their injuries during 1981/1982. Fifty-eight percent of the male and 62% of the female players reported injuries. The injury frequency was 2.5 injuries/1,000 activity-hours in male and 2.85 injuries/1,000 hours of activity in female players. This corresponds to 8.6 injuries/male team/season and 7.5 injuries/female team/season. An ankle twist was the most common injury (52%) while a knee injury was involved in 18%. Prophylactic orthoses for knee and ankle are suggested.