Dental treatment under general anesthesia is considered a good way for behavioral control in disabled patients. General anesthesia for disabled patients sometimes requires difficult airway management. In this case, intra-oral camera is great helpful to intubation. Originally, the intra-oral camera is designed to facilitate diagnosis dental disease. The intra-oral camera is very efficient on intubation. Laryngeal photo taken by Intra-oral camera can be good guide for difficult intubation. In this report, an 11-year-old boy with chromosomal anomaly received dental care under general anesthesia. And he had a potentially difficult airway. We achieved nasotracheal intubation successfully with intra-oral camera.