An object of the present invention is to suppress tongue discomfort at the time of wearing, to perform good tongue training by MFT, to allow the upper molar to be moved as expected, and to twist the molar to the mesial To provide a tooth moving device that can be prevented. A tooth moving device according to the present invention includes a track portion extending from a mesial side end portion toward a distal end portion of a distal end of a tooth side along a lingual tooth row, and a track portion. A slide portion 7 that is slidably mounted and engages with a holding member 51 attached to a maxillary molar, and a lock portion 8 that is fixed to the track portion 6 closer to the mesial side end portion 4 than the slide portion 7 The elastic portion 9 is interposed between the lock portion 8 and the slide portion 7 and biases the slide portion 7 toward the distal end, and the distal end is fixed to the embedding member 53 embedded in the palate. And fixed portions 2 and 3 connected to the portion 5. [Selection] Figure 1【課題】装着時における舌の違和感が抑制されるとともにＭＦＴによる舌のトレーニングが良好に行えるうえ、上顎の臼歯を所期した通りに遠心移動させることができ、また臼歯の近心への捻転も防止できる歯移動器具を提供する。【解決手段】本発明の歯移動器具１は、近心側端部４から遠心側端部５に向かって舌側の歯列に沿って延在する軌道部６と、軌道部６に対してスライド可能に装着されるとともに、上顎の臼歯に取り付けられる保持部材５１に係合するスライド部７と、スライド部７よりも近心側端部４寄りにおいて軌道部６に固定されるロック部８と、ロック部８とスライド部７の間に介在してスライド部７を遠心側端部に向けて付勢する弾性部９と、口蓋に埋め込まれた埋入部材５３に固定されるとともに遠心側端部５に連結する固定部２、３と、を備える。【選択図】図１
