Cardiac myxoma is rare but the most common primary cardiac tumor amongst all cardiac tumors, and left atrial origin is nearly 80%. It is responsible for different constitutional symptoms, progressive dyspnea, and systemic embolization. In this report 38 years patients was admitted with exertional syncope, In investigation transthoracic echocardiography demonstrated large left atrial mass encroaching into left ventricle. The mass after operation was diagnosed as myxoma. This diagnosis is very important from the patient point of view as in undiagnosed may be the forerunner of systemic embolization in different parts of the body.