Pediatric Nephrology of Seoul National University Children’s Hospital (SNUCH) runs world-class clinics for the whole spectrum of kidney diseases in children and adolescents. Its specialty includes genetic kidney diseases, end-stage renal disease, kidney transplantation, nephrotic syndrome, other glomerulopathies and tubulopathies, disorders of fluid, electrolytes, and acid-base balance and urinary tract infection. It is equipped with a dialysis unit dedicated exclusively to children and performs 10-20 cases of kidney transplantation each year. Laboratory medicine of SNUCH supports the diagnosis of the majority of genetic kidney diseases. Medical staffs in Pediatric Nephrology have excellent knowledge and vast experience and are actively leading many studies including global and national collaboratory studies