The authors divide their study into three chapters entitled 1, obsessive manifestations in childhood; 2, structures that appear in the child's development into which obsessive manifestations may be integrated; 3, anamnestic study of cases in which the psychiatrist and the analyst find obsessive manifestations during the patient's childhood. In conclusion, the authors underscore the need for a careful survey of those obsessive rituals that are normal at certain stages of development and that clear up spontaneously. Coöperation with psychologists is