To evaluate the pulmonary manifestations of Bechcet disease, authors reviewed the chest radiographs of 130cases of Behcet disease diagnosied at Seoul National University Hospital from January 1980 to December 1987retrospectively. Of the 130 cases, 6 cases (4.6%) showed pulmonary abnormalities that were considered as amanifestation of Behcet disease. Two cases showed round masses near the hila on chest radiographs which wereconfiremd as pulmonary artery aneurysm on angiographies. Two cases showed pulmonary infiltrates due to pulmonaryinfarcts. Others were a case of unilateral pulmonary edema due to compression of the contralateral pulmonaryartery by aortic aneurysm and a case of lung abscess due to esophagobronchial fistula as a complication ofesophageal ulcer. Though its occurrence is rare, nodular and/or infiltarative pulmonary lesions in patients withBehcet disease should be suspected as a vascular involvement of the disease itself until proven otherwise.