The aim of this research was to study the relationship between parenting styles and mental disorder of teenage girls. The statistical population of this research included the whole third-grade high-school teenager girls in Tehran, with mean age of 16.4 years, and that of their mothers of 40.2 years. Using multi-phase random sampling, 132 students and their mothers were chosen from 4 schools in 4 areas in Tehran as the sample. The scales used consisted of General Health Questionnaire (GHQ) and Baumrind parenting style questionnaire which were filled out by the girls and their mothers. The correlational design was used in this research. The results showed that there are significant positive correlations (p