As many as 110 junior schoolchildren with abnormal behavior, whose parents had taken advice of the psychiatrist, were examined. In the majority of cases, behavioral abnormalities were due to borderline residual organic disorders; more rarely, they involved characteristic and pathocharacteristic reactions including those seen in personality deviations or were related to mental diseases. Disinhibited behavior is mostly determined by biological factor whereas opposition and hysteroid behavior tends to positive correlation with microsocial factor. The majority of children with abnormal behavior, especially in the presence of low intellect and speech disturbances have a negative attitude to school. Some general recommendations are given to parents of difficult children.