Volleyball is a team sport that requires high perceptual-cognitive preparation, this study was conducted with the aim of identifying the primary maladaptive schemas dominant in volleyball athletes. This descriptive study was conducted on 463 volleyball athletes from clubs in different cities of Iran, who were selected by available sampling method and answered the 75-question questionnaire "Young's primary maladaptive schemas". The dominant schema of volleyball athletes (both men and women) is Impaired Autonomy and Performance, and among the 15 types of schemas, the primary dominant schemas are: social isolation/alienation, dependence/incompetence, vulnerability to harm/disease, lack of self-transformation. The Kolmogorov-Smirnov test showed that the distribution of all primary maladaptive schemas in volleyball athletes is significantly different from the normal distribution (p<0.05). The independent T test showed that there is a significant difference between the mean of the initial maladaptive schema in men and women, and the multiple variance analysis test showed that sports performance levels and medal winning levels have an effect on the primary maladaptive schemas (p<0.05). The multiple regression test showed that height, gender and medal winning levels are predictors of early maladaptive schemas in Volleyball athletes. As a result, Volleyball athletes' dominant schema is impaired autonomy and performance, and height, gender, athletic performance levels, and medal winning interact with primary maladaptive schemas. Since these schemes are affected by the behavior of the club personnel and coaches, one of the solutions can be the training of the sports officials of the clubs in order to promote the independence of the athletes.