Two cases of plasma cell granuloma of the lung, whose incidence is 0.7% in the tumor of the lung and bronchus, are managed at department of thoracic and cardiovascular surgery, College of Medicine, Choong Nam national University Hospital from March, 1983 to July, 1984. The plasma cell granuloma of the lung, which is usually asymptomatic, is most commonly detected in routine chest films. The prognosis of the plasma cell granuloma is good after surgical resection. One case [female] was undertaken right pneumonectomy, the other, left lower lobectomy. Both cases had uneventful postoperative courses and are well being now.