Background and Purpose: By developing new technologies, increasing the use of Computer games by children, the variety of these games, and their negative effects on children's sleep, identifying and monitoring games will be crucial. This study aimed to investigate the relationship between Computer Games addiction to sleep disorders in preschool children considering the role of moderating relationships with parents. Method: This is a correlation study. The sample of this study was 350 mothers of preschool children who were studying in the academic year of 2017-18 in areas 3, 5, and 6 Isfahan and were selected by convenient sampling. In this research, Farhadi computer addiction inventory ( 2016), Owens and Sprite (2000), and Baby-Baby Relationships (1961), were used. The results were analyzed using Pearson correlation coefficient and regression. Results: The results of correlation analysis showed that there is a positive and significant relationship between sleep deprivation computer addiction in children with sleep resistance, sleep duration, sleep anxiety, and parasomnia (P=0/001<0.05). However, there was no meaningful relationship with the components of delay in beginning sleep (P=0/20), night-time awakening (P=0/21), sleep disorder (P=0/05) and sleepiness (P=0/66), and the relationship with parents in the over-supporting component relationship with sleep disorders and addiction to computer games has a significant moderating effect (P=0/0012<0.05). However, with the acceptance components of the child (P=0/94), the more aggressive (P=0/52) and rejection of the child (P=0/34) does not have a significant moderating effect (P>0.05). Conclusion:The results indicate the positive relationship between sleep disorders and their adverse effects on the child, the way parents work, and the destructive role of computer games addiction. Extreme gambling plays a significant role in the development of problems and intensifying symptoms of sleep disorders, and on the other hand, child withdrawal also results in increased addiction to computer games and sleep disorders.