Repetitive and restricted behaviors, along with deficits in the social domain, are one of the criteria for diagnosing autism spectrum disorder (ASD). They refer to predictable actions that the child always repeats in a similar or the same way and include a wide spectrum of behaviors such as stereotyp ed motor mannerisms , preoccupation with parts of objects, insistence on sameness, limited interests, ritualized behaviors and sensory hypo and hyper reactivity. The prevalence of PSA is constantly increasing, and it is a disorder that, since its begin n ings , is diagnosed more often in boys than in girls. Large differences in prevalence between boys and girls raise the question of the reasons for this. Various studies have tried to find the answer in repetitive behaviors, so there are numerous contradictory r esults related to gender differences in the quantity and quality of repetitive and restricted behaviors. Therefore, the aim of this research was to investigate whether there are gender differences in repetitive and restricted behaviors in children with aut ism spectrum disorders aged 6 to 9 years and to describe them. 45 parents of children (28 boys and 17 girls) with an autism spectrum disorder, whose children are between the ages of 6 and 9 and have (above) average intellectual abilities, participated in t he research. Parents filled out the Repetitive Behaviors Scale Revised online, and the results were statistically analysed . Girls show more self injurious behaviors and these behaviors pose a more serious problem to their parents than boys. The results also show that girls have less restricted behaviors than boys. No statistically significant gender differences were found on the other subscales of the questionnaire. Repetitive behaviors in total represent an equal, moderate, problem for both parents of boys and parents of girls.