The purpose of this study was to determine what factors affect female high school students' participation in sport activities. Factors such as parents, peers, glory, staying in shape, love and siblings all influence participation. For this study a sample of convince was used. Sixty high school female students, 28 athletes and 32 non-athletes, were surveyed using the The Participation Motivation Questionnaire, (PMQ). This questionnaire has been used in past studies and is a good measurement for physical activity motivation. According to this study, it was concluded that athletes are influenced more by intrinsic factors such as fun and fitness, and non athletes are influenced by both intrinsic and extrinsic factors. Overall, for both athletes and non athletes, it was found that fun was the most influential factor among female high school students, but it was also concluded that several factors influenAce participation.