Teaching social skills, such as cooperation, self-expression, and empathy, is necessary for acquiring social skills and participating in social activities. In this semi-experimental research, the effect of social skills educational intervention on the self-efficacy of fourth to sixth grade female students in X schools was investigated from the perspectives of students and their parents. Before the intervention and 2 months after the intervention in both groups, related questionnaires were completed by students, parents and teachers. The educational program was presented twice a week during 12 1-h sessions, and parent education six 1-h sessions. The effectiveness of educational interventions in the subjects of social skills and its subscales in the students of the test group were statistically significantly different from the control group. No significant correlation was found between social skills and parental perspective on self-efficacy, empathy, and cooperation. Social skills training to primary school students can significantly improve their social competence, particularly in self-control, empathy, self-efficacy, and cooperation. However, no significant correlation was found between social skills and parental perspective on self-efficacy, empathy, and cooperation.