This study investigates the prevalence of attention deficit hyperactivity disorder (ADHD), conduct disorder (CD), and oppositional defiant disorder (ODD) among elementary students in Shiraz. Utilizing a random cluster sampling method, 1300 students were recruited, and evaluated with CSI-4 (parents form). 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%). These findings stress that prevalence of disruptive disorders are considerable in Shiraz, and need to be emphasized in the therapeutic and educational policies.