Abstract: The intraoral mandibular advancing positive pressure apparatus utilizes mandibular advancement (or protrusion) therapy with CPAP therapy. The mandibular advancement appliance is fabricated to receive a portion of a person's upper and lower teeth when the patient bites down on the appliance. The mandibular advancement appliance advances the patient's mandible a predetermined amount. The mandibular advancement appliance contains a fluid communication pathway that provides for access to the patient's oral cavity. A CPAP device is in fluid communication with the fluid communication pathway and supplies a continuous positive pressure air supply. The utilization of mandibular advancement therapy with CPAP therapy reduces the amount of advancement necessary through mandibular advancement and eliminates the need for nasal involvement or a facial mask typically associated with CPAP therapy.