Provided is an assistance implement for ameliorating sleep apnea syndrome, which is set in the oral cavity and can maintain the airway while the user is asleep. This implement is provided with an oral cavity insertion resilient body which is plate-like and bow shaped in a front view, and a flat plate-like lip-sandwiched resilient body which opposes from below the oral cavity insertion resilient body and is provided toward the front edge thereof. In a plan view, the lip-sandwiched resilient body has a substantially quadrilateral shape, having a length in the front-rear direction allowing the lip-sandwiched resilient body to be sandwiched from the front teeth to the lips, and a width in the left-right direction allowing the lip-sandwiched resilient body to be sandwiched between the lips. In a plan view, the front edge of the oral cavity insertion resilient body is the same as the front edge of the lip-sandwiched resilient body, and the length of the oral cavity insertion resilient body in the front-rear direction is such that the rear edge thereof is in close proximity to the soft palate, the area over which the oral cavity insertion resilient body opposes the lip-sandwiched resilient body has the same width in the left-right direction as the lip-sandwiched resilient body, and the width of the oral cavity insertion resilient body in the left-right direction to the rear of the opposing area allows the oral cavity insertion resilient body to come into contact with the cheek sides of the bottom of the oral cavity. An elongated ridge portion is provided below the oral cavity insertion resilient body, from the front edge to the rear edge thereof, and a regulating portion which has a cross-sectional shape with a substantially U-shaped groove formed with an opening portion facing the rear, and which prevents the tongue drooping down, extends downward from the rear edge of the center of the ridge portion.La présente invention concerne un dispositif d'assistance pour améliorer
