Purpose: This study aimed to investigate self-control and the relationship between self-control and family factors in girls and boys with mental disabilities. Research methodology: The present study was conducted by a causal-comparative method with an applied nature in 2020. The statistical population of all primary school students in the schools of mentally disabled was the Tehran Exceptional Education Organization. Using cluster sampling method, 196 children were selected as the sample. The informed consent form for participation in the research was also obtained from the stakeholders. Measurement tools in this study were Gersham and Elliott (1990) Social Skills Rating Scale and Kendall and Wilcox (1979) Self-Control Scale. Results: The results of statistical analysis showed that there was no significant difference between the average self-control of children with mental disabilities based on the level of education of parents and the job of the head of the family that the need to educate parents of mentally disabled children regardless of class Socially confirms them in order to be aware of their children's abilities. In addition, the level of self-control in the two sexes was not significantly different and there was no significant difference between self-control at different ages and emphasizes their gender in special schools. Limitation: Conducting research in schools always faces problems due to the interference between research time and classroom time. Conclusion: Based on the findings, it can be concluded that parental education has a significant role in advancing the goals of education and upbringing of exceptional children, including their self-control. Keywords: Restraint, Family factors, Children with mental disabilities