The aim of this study was to examine examination of pre-competition anxiety levels of muay-thai athletes. The investigation grup was composed from 350 muay-thai athletes (320 male and 30 female) joining to Turkey interuniversity muay-thai championship in 2018-2019 season. The demographic information form and Spielberger State-Trait Anxiety Inventory developed by Spielberger et al.(1970) and adapted to Turkish language by Oner and La Comte (1983) were used as data collection tools for measuring stated-trait anxiety levels of athletes. According to analyze results, there was no significant difference in pre-competition state-trait anxiety levels of athletes in terms of age and weight variables but there was statistically significant difference among pre-competition state-trait anxiety levels of athletes in terms of sport age variable (p<0.05). Consequently, it might be said that the state-trait anxiety levels of athletes with higher sports age were lower and athletes with high sport experience were more successful in dealing with anxiety.Keywords: Sport, Athlete, Muay-thai, Anxiety, State-trait anxiety.