The present invention provides a tooth movement device, which can not only suppress the discomfort of the tongue during installation and perform the tongue training by MFT well, but also can make the upper molars move telecentrically as expected, and can prevent the molars The direction of the heart is reversed. The tooth movement tool 1 of the present invention is provided with a rail part 6 extending from the proximal end 4 along the teeth row on the maxillary side to the distal end 5； and a sliding part 7 slidably mounted on the rail part 6, and engaged with the retaining member 51 installed on the molars of the upper jaw； the locking part 8, which is closer to the proximal end 4 than the sliding part 7, is fixed to the rail part 6； the elastic part 9, which is interposed in the locking Between the part 8 and the sliding part 7 and add potential energy to the sliding part 7 toward the distal end； and the fixing parts 2, 3, which are fixed by an implant member 53 implanted in the upper jaw and connected to the distal end 5.本發明提供一種牙齒移動器具，其不僅可抑制安裝時之舌頭之不適感並且良好地進行藉由MFT所進行的舌頭之訓練，而且可使上顎大臼齒如預期地進行遠心移動，此外可防止臼齒之朝近心之扭轉。本發明之牙齒移動器具1，其具備有：軌道部6，其自近心側端部4沿上顎側之齒列朝遠心側端部5延伸；滑動部7，其可滑動地安裝於軌道部6，並且與安裝於上顎之臼齒的保持構件51卡合；鎖定部8，其在較滑動部7靠近近心側端部4，被固定於軌道部6；彈性部9，其介設於鎖定部8與滑動部7之間且朝遠心側端部對滑動部7附加勢能；及固定部2、3，其被植入至上顎的植入構件53所固定並且與遠心側端部5連結。
