Problem to be solved: to provide a dental orthosis having a comfortable use preventing the meshing of the orthosis and a high orthodontic force and stability.The toothed orthosis 1 has a lip body part covering a part or a whole of the lip side portion of the dental part of a human body to be attached and a tongue side covering a part or all of the tongue side portion, and has a main body 2 of a main body 2 which is formed into a substantially U shape in plan view, and a wire 3 connecting the lip side portion and the tongue side portion. The portion corresponding to the occlusal surface of the main body 2 is removed, and the cutting g forms a gap G between the lip side and the tongue side.The wire preferably has a tongue side portion which passes through the tongue side of the harness body 2, a connecting portion connecting the tongue side portion and the lip side portion, and a lip side portion passing through the lip side portion.Diagram【課題】装具の噛み込みを防止した快適な使用性と、高い矯正力及び安定性とを両立した歯列装具を提供する。【解決手段】歯列装具1は、装着する人体の歯列の唇側部分の一部又は全部を覆う唇側部と舌側部分の一部又は全部を覆う舌側部とを有し、平面視で略U字形状に形成された装具本体2と、前記唇側部と前記舌側部とを接続するワイヤー3とを備える。装具本体2における咬合面に対応する部位が切除されており、該切除により前記唇側部と前記舌側部との間にギャップGが形成される。ワイヤーは、装具本体2の舌側部を通る舌側部分と、舌側部と唇側部の間を接続する接続部分と、唇側部を通る唇側部分とを有することが好ましい。【選択図】図1A