Purpose : To evaluate the effectiveness of percutaneous catheter drainage in treatment of the lung abscess.Materials and Methods : We treated the lung abscesses in 14 patients (12 men, 2 women), who did not respond tomedical therapy, by percutaneous catheter drainage under fluoroscopic or ultrasound guidance. One abscess due toinfacted bulla was managed by combination treatment with alcohol sclerosing therapy. Patients were followed byserial chest radiographs every three days and amount of drained or aspirated pus evaluated. The treatment effectand recurrence were followed by chest PA and lateral chest at on week after removal of drainage catheter. Results:Thirteen patients (93%) recovered clinically and radiologically within 3 days. In 10 patients, drainage cathetercould be removed within 2 weeks, and three patients, the catheter was keept longer. Most complications weremild;vague to moderate chest pain(n=14), mild hemoptysis(n=2), and pneumothorax (n=1), One man who suffered fromfar advanced pulmonary tuberculosis died of asphyxia caused by massive hemoptysis 16 days after percutaneousdrainage.