Introduction: Social phobia is one of the most prevalent anxiety disorders in adolescence years. This disorder owns negative effects on overall health and performance of this group of society people. The aim of this study is determination the prevalence of social phobia disorder among high school students in Abhar city.
 Materials and Methods: In this cross-sectional/descriptive study, numbers of 5526 high school students during academic year of 2011-2012 in both of two genders were selected. Participants were studied by using Liebowitz questionnaire through anonymity principle. In addition, the information related to their demographic features was also collected. SPSS software (version 17) was used for statistical analyses. Absolute and relative frequency distribution was applied to describe data and chi-square test was used to determine and compare the ratio of social phobia disorder according to field variables.
 Results: Totalprevalence of social phobia disorder was 17.2% in the population. The study showed that female gender (P=0.000), age (P=0.001), single marital status (P=0.001), low population of family (P=0.003), parents’ elementary and middle education (P =0.001), mother’s house maker being (P=0.012), father’s free job (P=0.002), urbanism (P=0.000) and family’s average income (P=0.000) have relation with higher prevalence of disorder.
 Conclusion: The prevalence of social phobia disorder is high among high school students in Abhar city. Findings can help the decision-makers of health and hygiene in implementing a kind of comprehensive strategy in population regarding interference of mental health promotion arena and preventing from infecting into social phobia disorder.