The goal of this study is considering Practicality, Reliability, Validity and Norm Finding of the Behavior Problems Scale of in a sample of Iranian children from 4 to 6 years old (402 children of both sexes).The Cronbach's alpha coefficient of 42 items questionnaire was 0.922.An exploratory factor analysis was performed and Principal Component Analysis, using a Varimax rotation, extracted 6 factors: Attention Problems/Overactive, Antisocial/Aggressive, Social Withdrawal, Self-Centered, Hypersensitivity, Anxiety/Somatic Problems. Finally, for description of children's Behavior Problems scores, the percentile and categorical norms have been provided.