A 57 year-old woman was aware of breath odor and visited to our hospital. There were no abnormal findings in her physical examination and chest X-ray. Multiple polyps in the trachea and both main bronchi were discovered by fiberoptic bronchoscopy. They were 0.1-0.5 cm in diameter. In a histological examination, squamous metaplastic epithelial cells and numerous inflammatory cells infiltrating subepithelially were seen. No malignant cells were found. The patient had suffered from chronic sinusitis for 15 years, and it was suggested that the development of tracheo-bronchial polyps was associated with chronic sinusitis.