Objective: This study investigates the prevalence of attention deficit hyperactivity disorder (ADHD), conduct disorder (CD), and oppositional defiant disorder (ODD) among elementary students in Shiraz.Method: Utilizing a random cluster sampling method, 1300 students were recruited, and evaluated with CSI-4 (parents form).Results: Data analysis revealed that %17.5 of the students have these three disorders, and the boys had a greater ratio. It included attention deficit (%6.7), hyperactivity-impulsivity (%6), Combined ADHD (%5), CD (%5), ODD (%3.6).Conclusion: These findings stress that prevalence of disruptive disorders are considerable in Shiraz, and need to be emphasized in the therapeutic and educational policies.