Authors reviewed about scoliosis the chest films of 325 congenitalheart diseasepatients who visited Seoul National University Hospital during the period of Jan. 1986 to Dec. 1987 to find out the incidence of scoliosis in congenital heart disease patients and to define the nature of scoliosis associated with congenital heart disease and came to following conclusions. 1. When curvatures of 10 degrees or more on chest P-A was classified as scoliosis, the incidence of scoliosis was 14.4%. It was more than 6 times the prevalence of scoliosis of 2. 3% in general population in Korea. 2. There was no difference in the incidence of scoliosis between the cyanotic and acyanotic heart diseases (P < 0.05). 3. There was no difference in the incidence of scoliosis between individual heart diseases (P < 0.05). 4. The scoliosis associated with congenital heart diseases showed a relative male preponderance. The male to female ratio of scoliosis was 1: 2.1 in patients with congenital heart disease while male to female ratio of idiopathic scoliosis in in general populationwas 1: 8.7 in Korea. 5. The curve pattern of scoliosis associated with congenital heart disease was predominantly right sided, comprising 74.5%. There was no difference of curve pattern between the scoliosis associated with congenital heart disease and the scoliosis in the general population. 6. The curve pattern of scoliosis was influenced neither by the side of the aortic arch nor the thoracotomy incision.