The aim of this study is to investigate the effect of 4-month basketball training on speed, agility and jump in youth male basketball players. A total of 14 male basketball players from the youth category participated in the study voluntarily. Before the research, parents' consent documents were obtained from the parents of the players. The study included players who continued basketball training for 4 months. Subjects performed basketball training 3 days a week (90 min every day). 20 m sprint, Illinois agility test, vertical and horizontal jump tests were applied in the research. Pre-, mid-, and post-test designs are used in measurements (First test, 2. month and 4. month), and they were carried out in three different test periods. One-way repeated measures analysis of variance was used to determine differences between measurements. The Holm-Sidak test was used to determine the differences between the groups (p < 0.05). There was a significant difference between the measurements in the body height, body weights and horizontal jump of the subjects. In addition, an improvement in vertical jump, 20 m speed and agility performances were observed at the end of the 4th month. It was found that 4-month basketball training caused a significant increase in physical and motoric features seen in youth male basketball players. It is thought that the significant increase in speed, agility and vertical jump performance will occur after longer training sessions. It should also be remembered that growing up can affect the positive increase in performance.