Osteochondroma, known as osteocartilaginous exostosis, is most common benign bone tumor. The pyriform sinus are extremely rare involved, and there are a few cases reported. Most patients complain of foreign body sensation, and histologic diagnosis can confirm the disease. Treatment is by surgical excision. This should give complete resolution and there were rare recurrences with good prognosis. We experienced a osteochondroma of the priform sinus presenting as a submucosal mass. We report the case with a review of literatures.