A 58-year-old woman was hospitalized in our hospital on July 9, 1988 with the chief complaint of progressive dyspnea for three months. She had been treated as bronchial asthma before she came to our hospital. During the hospitalization, bronchoscopic examination showed a lobulated mass arising from the left anterior lateral wall of the middle trachea. Chest CT scans showed two lesions: one was a nodular protruding mass in the middle trachea; the other was a soft tissue mass at the left thymic area. We performed a total resection of the tracheal tumor and partial resection of the mediastinal tumor. The pathological diagnosis was malignant fibrous histiocytoma of the trachea and squamous cell thymic carcinoma.