We experienced 6 cases of primary cardiac tumor, all received operation for removal of tumor. Mean age was 43.8 years-old ranging from 17 years-old to 66 years-old. Five cases were female, one case was male. Five cases were benign, myxoma, all located within left atrium. One case was malignant, angiosarcoma within right atrium. All patient showed cardiac manifestations. One case was in NYHA functional class II, two were in III, three were in IV. Four patients showed constitutional symptoms, but no one showed evidence of embolic phenomenon. All case of myxoma showed cardiomegaly except one malignancy. Only one case was regular sinus rhythm, three were sinus tachycardia 8z two were atrial fibrillation. The most common site of tumor origin was fossa ovalis limbus[four of all]. Two of five myxomas received emergency operation, one patient died postoperatively. Lived four patients showed no evidence of recurrence[mean follow-up, 3,5 years], but one patient has Grade II /IV mitral regurgitation & in OPD follow-up now, One malignant case, 17 years-old cerebral palsy female, was angiosarcoma occupied most of right atrial chamber originated from anterior wall of right atrium, received emergency operation which was removal of mass & reconstruction of right atrium with artificial pericardial patch. This patient died on postoperative 36th day due to persistent LCOS[low cardiac output syndrome] with combined sepsis.