The purpose of this study was to investigate relationship between self expression and burnout in college athletes. 355 college athletes were selected for this study, and Self expression questionnaire(Rakos & Schroeder, 1980) and Athletic burnout questionnaire(Raedeke, Smith, 2001) were used and analyzed for this study. The results of this study was as follows. Firstly, self expression was much higher in upper grade than in lower grade, and it was also higher in collective sports than in individual sports. The result showed that self expression was higher in the athletes who have experienced a member of national team. Secondly, the result by Multiple Linear Regression Analysis between self-assertiveness and burnout showed that there was significant difference relationship between decrease of achievement and decrease of values nagatively. Therefore, the result could be interpreted that if the athletes show their self expression clearly, it could affect positively on increasing their own value and sense of achievement. Especially, it is difficult to express selt-assertiveness to someone by environmental limit for Korean college athletes. Based on the result of this study, self expression program should be developed to help express their own opinion appropriately for Korean college ahtletes in following-up study.