Although mediastinal involvement by Hodgkin's disease is frequent, the initial presentation of the lymphoma by an endobronchial lesion is rare. A 23-year-old man was admitted with progressive dyspnea. Initial chest roentgenogram showed atelectasis of right middle and lower lobe. Fiberoptic bronchoscopy showed a polypoid mass obstructing the right mainstem bronchus. The mass lesion was histologically confirmed as Hodgkin's disease, nodular sclerosis type. He received systemic chemotherapy and improved rapidly.