Locus of control (LOC) is one of the psychological aspects that affect the athlete's appearance in competing. This study aims to look at the description of LOC in athletes and the factors that cause the appearance of LOC in athletes. Researchers used a case study approach and data collection by direct interviews with a 21-year-old subject who was a wushu athlete. The results showed the subject has the characteristics of an athlete with a locus of control that tends to be internal, this can be seen from the subject's efforts to achieve his life goals, the subject does not give up easily and give up in the face of a competition. The subject chooses to keep trying in a match even though the opponent is very difficult. The factors that cause the emergence of LOC in the subject include age, family and environment.