Simultaneous triple valve replacements were performed in two patients on January and April 1980 at Seoul National University Hospital. The first case was 17 years old male patient with a history of exertional dyspnea for 7 years. He was in class III by the NYHA functional classification and diagnosed as aortic insufficiency, mitral steno-insufficiency and tricuspid insufficiency. The second case was 46 years old male patient suffered from exertional dyspnea for 5 years, He was in class IV and diagnosed as aortic stenoinsufficiency, mitral stenoinsufficiency and tricuspid insufficiency. Triple valve replacements were performed under the deep hypothermia and pharmacologic cardiac arrest with aortic cross clamping for 80 minutes to 159 minutes. Total extracorporeal circulation time were 197 and 176 minutes respectively. The postoperative courses were uneventful.