Childhood diabetes is a chronic illness resulting from absolute or relative insulin deficiency. It can cause metabolic derangement of carbohydrate, fat and protein. The aim of treatment is to normalizo blood sugar and bring the metabolic derangement to normal as much as possible. Diabetes Control and Complication Trial(DCC) inthe United States showed that strict control of diabetes in childhood could delay late complications: nephropathy, retinopathy, and neuropathy. However, this may cause a high incidence of hypoglycemic attack. To reach the best diabetes control, multidisciplinary team is needed. The Endocrine Unit, Department of Pediatrics. King Chulalongkorn Memorial Hospital has established a clinical and educational program for childhood diabetes since 2000. Accordingly, tho aim of this study was to study the metabolic control in children with diabetes who weno attending the diabetes clinic at tho Department of Pediatrics, Kng Chulalongkom Memorial Hospital during 2000 and 2001