Objective: Determine the characteristics of epidemiology, clinical manifestations, laboratory findings, complications, treatments of pneumonia due to Klebsiella in congenital heart disease patients at Cardiovascular Department of Children's Hospital 1.Method: Case series study. Results: From June 2007 to December 2008, 97 congenital heart disease (CHD) patients acquired pneumonia associated with NTA or blood culture positive with Klebsiella.