We recently experienced a case of primary malignant fibrous histiocytoma of the left pulmoary artery occurred in a 27-year-old man who had 5 months history of interittent hemoptysis. Chest X-ray revealed multilobulated mass density in left hilar aream and another small lobulated modular density in left upper lung field, which was intrapulmonary metastatic deposit. CT scan, pulmonary ateriography, and selective left bronchial arteriography after partial resection of the left hilar mass and left upper lobectomy revealed the mass to have the characteristic feature.