A case of inflammatory polyp of the trachea was reported. Tracheostomy and tracheal cannula placement were performed in a-72-year old male in 1985. Six years later, he developed dyspnea. Bronchoscopic findings showed a hemispherical polypoid lesion in the anterior wall of the trachea. The polypoid lesion was identified microscopically as inflammatory polyp. It was suspected that its development was due to tracheal cannula intubation.