BACKGROUND Lung involvement in inflammatory bowel diseases usually follows colitis. However, the time to lung involvement onset varies depending on the case, and pulmonary lesions are usually not parallel to exacerbations of the colitis. METHODS A 67-year-old Asian woman with a 38-year history of ulcerative colitis presented to our hospital with a complaint of prolonged dry cough for 2 months. The colitis had remained quiescent for > 35 years with low-dose salazosulfapyridine treatment. Chest computed tomography indicated circumferential thickening of the tracheal wall, while bronchoscopy examination revealed widespread erythematous edema and diffuse narrowing of the bronchial lumen. Biopsy of the bronchial mucosa showed submucosal lymphocytic infiltration. She was diagnosed with ulcerative-colitis-related tracheobronchitis and successfully treated with corticosteroids. CONCLUSIONS Tracheobronchitis, in our case, occurred despite the longest remission period previously reported. Careful follow-up is necessary for the early recognition and treatment of pulmonary disease in patients with ulcerative colitis, regardless of the disease duration and long-term remission of colitis.