Abstract: The invention relates to an oral orthesis for reducing snoring and sleep apnea symptoms includes a maxilla palate plate having a front edge at the front teeth, a back edge at the soft palatum and two sides edges at the molar rows and, attached thereon, fixing means to fix the plate in the oral cavity and a tongue positioning device, wherein the tongue positioning device comprises a pellotte attached to a pellotte bar mounted into the plate with a spring wire engaged to press the pellotte against the tongue when positioned in the oral cavity, wherein the pellotte bar is mounted in the maxilla plate near the front edge of the plate between the molar and cuspidate teeth plus or minus 5 mm, wherein the pellotte bar in rest position is at a mounting angle relative to the occlusal plane between 30 and 60 degrees inclined towards the back edge of the plate and wherein the pellotte bar has a bend near the pellotte towards the front edge with a bend angle (b) between 60 and 30 degrees bringing the front surface of the