An ankylosis of temporomandibular joint (TMJ) can cause severe trismus, thus it may bring on many difficulties in airway management such as orotracheal intubation or laryngeal mask airway insertion. Such difficulties may cause serious complications related to airway management because the trismus due to ankylosis of TMJ can not be improved by administration of muscle relaxants or deep anesthesia in most cases.We report a case of nasotracheal intubation guided by a fiberoptic bronchoscope in a male patient with severe trismus due to TMJ ankylosis, who was scheduled for undergoing ophthalmic surgery