Abstract: Self-efficacy is one of the most important factors in development of healthy social communication that makes people’s life pleasurable. The present study aims to survey effectiveness of social skills education on self-efficacy of children with hearing impairment in Shahriar ( Tehran-Iran) in 2015. The study is a quasi-experimental single-group study in pretest-posttest type which was carried out on 25 students with hearing impairment, who were selected through purposive sampling. A 12-Session social skills training program was carried out for each participants. Each session was one hour (2 Sessions in week). Demographic form and Wheeler and Ladd children’s Self-efficacy questionnaire were used to gather information. Data analysis was performed by SPSS version 22 using description statistics tests, paired T-test and ANOVA with repeated measure. A p-value less than 0.05 are considered as a statistically significant level. The findings indicated that social skills education affected on self-efficacy positively. Before the intervention, self-efficacy score was 38.4±5.5; this figure immediately, , one week and one month after the intervention was 66.6± 6.7, 70.1± 6.3 and 71.2±6.1 respectively. In other words, there was a significant increase in self-efficacy score (p = 0.01). In addition, self-efficacy was directly related to education level of fathers (p = 0.01, ŋ = 0.69), mothers (p = 0.001, ŋ = 0.64) and intelligence quotient (p = 0.01, r = 0.57). Social skills education led to increase of self-efficacy in children with hearing impairment. Therefore, it is recommended training social skills as an effective method to improve self-efficacy in children with hearing impairment.