The aim of this research was to investigate the effect of individual and group games on social skills and self-efficacy in children with developmental coordination disorder. The current research is a semi-experimental type with a pre-test-post-test design with three groups of individual games, group games and control group. The statistical population included children with developmental coordination disorder in Mashhad with an age range of 8-9 years. A number of 45 people were selected by available and targeted sampling and were randomly grouped after obtaining written consent. The instruments used were the Persian version of the developmental coordination disorder questionnaire, MABC test, Wiland social development scale and children's self-efficacy scale in interaction with peers. The implementation method was that first the pre-test of social development scale and self-efficacy scale was taken. The research intervention was carried out in groups and individually for a period of 8 weeks, twice a week for 45 minutes. After completing the intervention, the Wiland social development scale and self-efficacy scale were taken. The results of this research showed that the intervention of group and individual games had a significant effect on improving the social development and self-efficacy of children. Also, regarding the difference between the groups, the results showed that group games were more superior to the other two groups. Therefore, due to the greater effectiveness of group games, it is suggested to coaches and occupational therapists to use group games to improve the social development and self-efficacy of children with developmental coordination disorder.