Extracolonic manifestations which occur in approximately 10-20% of patients with ulcerative colitis most commonly affect joints, skin, liver and eyes. In contrast, pulmonary involvement in ulcerative colitis is very rare. However, a variety of respiratory disorders has been associated with ulcerative colitis, including pulmonary vasculitis, bronchiectasis, chronic bronchitis, interstitial fibrosis, pleural effusion. Since the first observation of pulmonary involvement in ulcerative colitis by Kraft in 1976, a few cases have been reported, and probably no such case have been reported in Korea yet. Here we report an experience concerning 56 year-old man interstitial lung disease in ulcerative colitis, who was diagnosed by clinical, radiographic, endoscopic, histologic findings.