In an attempt to study sex differences in child behavior disorders, 834 clinic-refered children(582 boys and 252 girls) between the ages of 6 to 11 were assessed using CBCL parental form and the data were factor analysed to form empirically derived syndromes for each sex. The analyses yielded eight behavior disorder syndromes for boys and ten, for girls. Six syndromes(aggressive, hyperactive, delinquent, social withdrawal, emotional lability, physical complaints) were found in both sexes while obsessive, depressive and psychotic syndromes were organized differently in boys and girls. There were also considerable differences in item composition of the six syndromes common to box sexes, suggesting that clinical features of common behavior disorders such as aggression and hyperactiveity might be different for boys and girls despite their apparent similarity. The results were discussed in terms of culturally shared attitudes and beliefs concerning sex differences in behaviors.