Research presented in this thesis was conducted on a sample of 137 male basketball players from 12 clubs of the Croatian Telecom Premier League during season 2017/2018. The aim of this study was to determine the type and frequency of sports injuries, the severity of injuries and the place of their occurrence. Also, based on the results of the research, the main guidelines will be provided to trainers for the development of quality prevention and fitness programs with the aim of reducing the frequency of injuries. The basketball players filled out a retrospective injury questionnaire. A total of 117 injuries were recorded, resulting in an average of almost every basketball player being injured once (0.85 per player). Injuries were more frequent in training (64%) than in competitions (34%). The most common mechanism of injury is the acute mechanism (85%). The most common types of injuries are ligament strain (28%) and muscle strain (25%). The most frequent injuries are of the lower extremities (72.5%) with an emphasis on ankle injuries (42%) while in second and third place are patellar tendinopathy and lower back pain with equal 7%. Given the time absence of players from the field, moderately serious (26%) which caused the absence for more than a week and severe injuries (32%) prevail, which caused the absence for more than twenty days. There is a uniform distribution of the number of injuries among playing positions without statistically significant differences in anthropological characteristics between injured and uninjured players. The best clubs (the top three in the table) had a much lower injury rate compared to the lower-ranked clubs.