The aim of this study was to determine predictors of social phobia through studying some social phobias predictors. In this study, shyness, social self-efficacy and coping styles were assessed as predictors of social phobia. 262 students of Tehran secondary education participates in this study. The students completed measures of social phobia, shyness and self-efficacy scales for social situations and coping style. After collecting the data, the results are analyzed using determining correlation coefficients and statistical model of simultaneous multivariable regression. The results showed that all three variables of shyness, social self-efficacy and coping style had a significant relationship with social phobia and the pattern of social phobia prediction comprised of shyness and emotion-focused coping style. Therefore, it can be concluded that the emotion-focused coping style and shyness can predict social phobia among secondary school students.