This study is to determine the association between parenting style of mothers and the social competence of their adolescent daughters in effective communication, problem solving skills and use of basic social skills dimensions. The data were gathered for the mean age of 11-15 years on 737 Iranian adolescent girls in a cross sectional study design. The parenting style of mothers was based on their demand and responsiveness. These scales classified mothers into four parenting styles as follows: authoritative, authoritarian, permissive, or neglectful. The social competence was also categorized into effective relationship, problem solving skills, use of basic social skills dimensions. The mean scores of the adolescents' social competence whose mothers had permissive and authoritative parenting style was higher than that for the two other groups for all the dimensions (p \ 0.05). The results showed that with the expectation of controlling roles, the supportive role of mothers can be more effective in providing opportunities for social competence performance.