Endobronchial osteochondroma, a rare neoplasm of the tracheobronchial tree, was treated successfully by surgery in our hospital. A 70-year-old male was admitted with obstructive pneumonia. Bronchoscopy showed an intrabronchial tumor almost completely occluding the orifice of the right B(8+9+10). Biopsy of the tumor did not lead to a specific diagnosis. Right lower lobectomy was performed. The tumor was 1.5 x 1.0 x 1.4 cm in size. The histological diagnosis was osteochondroma. The postoperative course was uneventful, and he is in good condition 19 months after surgery.