This study was aimed to investigate psychometric properties of the Sport Stress Coping Styles Scale including internal consistency, test-retest reliability, content validity, concurrent validity, and predictive validity in a sample of volunteer athletes. One hundred and forty-four athletes (103 males, 41 females) were included in this study. All participants were asked to complete the Sport Stress Coping Styles Scale (SSCSS) and the Mental Health Inventory (MHI). The athletes' coaches were asked to rate the Sport Achievement Scale (SAS) in order to measure students' sport achievement. Test-retest reliability and internal consistency of the SSCSS were examined at satisfactory levels. Content validity, concurrent validity, and predictive validity of the SSCSS were calculated according to correlation coefficients between the scores on the SSCSS subscales and scores of psychological well-being, psychological distress, and sport achievement. All correlations were statistically significant. It can be concluded that the SSCSS is a valid instrument for measuring the way athletes cope with sport stress.