The technique of submental intubation in patients with multiple facial fractures and skull base fracture was originally described by Altemir. This technique provides a secure airway and allows intermaxillary fixation while avoiding the complications of nasotracheal intubation or tracheostomy. However, when the endotracheal pilot balloon and endotracheal tube are pulled through the submental incision site using this technique, soft tissues or blood may enter the endotracheal tube and trauma may result in the surrounding tissues. To overcome these problems, we carried out a modification of submental orotracheal intubation using the blue cap on the end of the thoracic catheter in a patient with mandibular fractures and injury to the skull base and found that this modification resulted in a safer and less traumatic intubation.