A case is presented of massive hemoptysis treated with double-lumen endotracheal tube. The cause of hemoptysis was bronchiectais in the left lung which prolbably resulted from pulmonary tuberculosis. In spite of intensive care using single-lumen endotracheal tube with its tip in the right main stem bronchus, the patient's arterial blood gas profiles went worse. But the use of double-lumen endotracheal tube enabled us to separate both lungs, to toilet the left lung and to apply mechanical ventilatory support on the contralateral lung. The main cause of death of massive hemoptysis is known as aspiration of blood into the contralateral normal lung resulting in asphyxia. So evacuation of blood and protection and ventilation for the uninvolved lung are very important in the management of massive hemoptysis. Double-lumen endotracheal tube provides lung isolation, bilateral suction capability and bilateral lung ventilation in the setting of acute endobronchial hemorrhage, so it is recommended as one of supportive measures in the early phase of massive hemoptysis.