A method for one-lung anesthesia has been developed in which Fogarty occiusion catheter is used to produce endobronchial blockade. It eliminates most of the problems which occur with the standard technique using a doublelumen cuffed endobronchial tube. No significant problem has been endobronchial tube. No significant problem has been encountered in this bronchoplasty case. This method is so simple and effective. A standard endotracheal tube was introduced, and a Fogarty catheter was inserted through the endotracheal tube to the desired main bronchus just before the left abnormal bronchus was open. After opening the bronchus, the Fogarty catheter could be placed in the appropriate location by sight. Once one-lung ventilation was no longer necessary, the Fogarty catheter could be deflated without distrubing the endotracheal tube.