In this work is presented the experience with Osgood Schlatters disease in young male basketball players. From one overall number of 257 young male basketball players with ages between 10 and 16 years is found that 23 or 8.9% had Osgood Schlatters disease. In control group of 250 young males (10-16 years) without sport activities is found 4 % of Osgood Schlatters disease. All patients were treated with rest of training and sports activities and after that with physioterapy. After 6 months everybody were allowed to have a full practice without clinical and radiological signs of disease. Stronger physical activities in an early adolescent’s period are one of main factors of appearing of Osgood Schlatters disease.