The purpose of this study is to investigate the effects of team performance on team cohesion by junior high school girls basketball team. Subjects were the participants of1994 junior high school girls Chi-Chiang basketball contest in Taiwan. The results show that the successful performance of junior high school girls basketball team has the negative influence on their team cohesion. The study results are not concordant with the previous studies and relative theories. Due to the limited research area of this study, many related factors are not investigated yet. There fore, to make any conclusion from this study must be very careful and this study has its limitations, too. More further research is needed to continuously explore this topic.