Introduction: In recent decades, psychologists have concluded, in considering behavioral disorders and social corruptions, that many disorders and harms result from lack of ability in correct analysis of self and self situation, lack of control sensation, and personal competence in order to face difficult conditions as well as lack of intelligence for solving real life problems in an approperiate way. Thus, the purpose of current research was to study the effect of training social skills on behavioral disorders of preliminary children. Materials & Methods: This research was accomplished on 90 students (45=male, 45= female) in third, forth and fifth grades, based on children symptom inventory (CSI-4) affected with behavioral disorders. Educations included educating social skills for Stephens class and list of social skills of Walker that were presented by group discussion, role playing, and modeling. Findings: The results showed that training social skills resulted in reducing behavioral disorders indicators (F=2, 026/785). This reduction implied a significance level = /001 in male and female groups. (F= 840/777= for male and F= 2,149/150 for Female). Discussion & Conclusion: Analyzing the finds showed that the children's problems, affected with behavioral disorders who were under social skills training, reduced. These results indicated that hygiene and health affair professionals must try to consider trainig social skills from the preliminary course on. As a result, it can be said that training social skills culminates in an increased mental health and plays an effective role in preventing behavioral problems and psychosis.