In this study, it was examined whether there were discrepancy between raters related with the assessment for maladjustment problem of children and adolescents, and tried to figure out whether the discrepancies were related with children’s character, parents’ trait and characteristic of relationship or not. For this 296 students attending elementary, middle, high school (116 boys and 180 girls) and their parents were rated by KCPI-S, KAPI-S, KPRC and SCL-90-R. In the result, children and adolescents’ depression problem was reported higher at the self-report than the parents’ rating, and somatization, delinquency, and hyperactivity were reported higher at the parents’ rating than the self- report. These discrepancies between interrater were statistically meaningful at the children’s character (sex, level of school (elementary, middle, and high)), parents’ trait (depression and anxiety), and characteristic of relationship (family problem). Through this, it had been verified that the rate for the children and adolescents’ maladjustment problem would be different according to their sex and level of school, and parents’ emotional problem, and the family problem level. There result shows the importance of interrator for the assessment of the maladjustment problem of children and adolescents, and is meaningful for it had confirmed the traits’of interrator and subject by the factors related with the interrator discrepancy.