A retrospective clinical study on 63 cases of intussusception in infants and children, who were admitted to the department of pediatrics and surgery from May, 1974 to Feb. 1978, was done. The prognosis of this disease is dependent upon early diagnosis and treatment but the causatio of this disease is not clear yet. It is a relatively common disease and we think it is worthwhile to analyze our won cases. The results were : 1. Among 63 cases, 37 were admitted to the department of pediatrics and 36 were admitted to the department of GS. 2. In age distribution, 85% of the patients were under 1 year of age and the peak incidence was 3~9 months of age. 3. Male was predominant than female. Male to female ratio was 2.8:1 4. The 58.8% of the patients were above 50 percentile of body weight comparing with Korean standard data. 5. In the aspect of the etiology, 96.9% of the cases were idiopathic and only 3.1% of the cases had organic causes. 6. The 4 cardinal symptoms were abdominal pain(93.7%), vomiting(90.%), bloodymucous stool(80.1%) and abdominal mass(74.6%) 7. Among the cases, colocolic type was 33.3%, ileocolic type was 22.2% and ileocecal type was 20.6% 8. The 71.4% of the cases were reduced successfully by barium enema. 9. Recurrence rate was 4.8%.