Cardiac hemangioma is a rare benign vascular tumor. A 44-year-old woman with hemangioma arising from the left atrium and transient atrial fibrillation is reported. Echocardiography, computed tomography and magnetic resonance imaging suggested a hypervascular tumor with clear borders in the pericardial cavity. Selective coronary angiography demonstrated feeding arteries arising from the right and left circumflex coronary arteries. Under cardiopulmonary bypass the tumor was successfully resected. Pathological examination showed a cavernous hemangioma. There is no evidence of recurrence and the patient is doing well three years after the operation.