A lingual thyroglossal duct cyst(LTGDC) is a rare congenital anomaly that account for only 0.5% to 2% of total thyroglossal duct cyst. LTGDC frequently associated with respiratory problem in infants and pharyngeal foreign body sensation or dysphagia in adults. Because of its location and characteristics, lingual thyroid, dermoid cyst, vallecular cyst should be included in differential diagnosis. Standard treatment for thyroglossal duct cyst is sistrunk’s operation, but in terms of LTGDC, because of its location and cosmetic reasons, different kinds of treatments such as electrical cauterization, CO2 laser, Robort surgery via transoral approach have been introduced. Recently authors encountered 20 years old woman with LTGDC and the mass was removed successfully via transoral approach using CO2 laser. We report the clinical course with review of the literature.