The main purpose of this research was to investigate senior high student's leadership behavior and cohesiveness. The subjects were 16 female and 34 male collegiate student. Fifty participants of senior high students finish two questionnaires: Leadership Scale Sports lead the behavior (LSS) and group's cohesiveness (GEQ). The data was analyzed by dependence t-test, independent t-test and one way ANOVA. The result was as follows: The order of LSS: training instruction, social support, positive feedback, and autocratic behavior. Player prefer more training instruction and DB. Female was significant higher than training instruction and DB. The order of GEQ: GIT, ATGS, GIS and ATGT. It's meaningful and helpful for student and coach to improve team cohesion and sport performance.