Abstract: The aim of this research was to determine the impact of Specialized Training program according to Basketball players' positions on Tactical performance and competitive behavior in junior basketball Players. To achieve the purpose of these study 60 junior female basketball players were selected from Sports Academy for Basketball in Zagazig-Egypt under 16 years of age (age: 14.65 ± 0.48 years; body height: 161.40 ± 3.09 cm; body mass: 57.38 ± 3.68 kg; training age: 1.43 ± 0.55 years). They were divided into two equal groups, namely Specialized training group according to playing positions (guard, forward, center), (STP) group and Control group (CON). Competitive behavior and Tactical Skills Scales were administered for collecting the data from the subjects, the total duration of specialized training program was 8 weeks. After 8 weeks of training period, data was collected on tactical performance and competitive behavior for both groups. The collected data was statistically analyzed by using “t” test to find out the difference between the two groups (STP) and (CON). Based on the results it was concluded that the STP group was significantly improved in tactical performance and competitive behavior more than (CON) group. The findings from this study supported the use of specialized training according to Basketball players' positions on training junior basketball players to improve thier tactical performance and competitive behavior.