An orthodontic appliance comprising: a base member fixed to two or more screws implanted in a vicinity of median palatine suture of a palate bone; an arm-shaped arm member having a first connecting portion connected to the base member and a second connecting portion located in a vicinity of palatal side of a tooth; and a traction member that is made of a wire material which is elastic and pulls a tooth as a traction target (Tl), wherein the orthodontic appliance is characterized in that the traction member having: a traction base portion fixed to the second connecting portion; a traction fixation portion hooked on a bracket that is fixed to the traction target located away from the traction base portion; and a traction force generation portion that is located between the traction base portion and the traction fixation portion and applies a rearward traction force and a frontward rotational force or a frontward traction force and a rearward rotational force to the bracket via the traction fixation portion, the traction fixation portion having a bent portion in which the wire material extending along dentition is plastically deformed and bent toward a tooth root side, the bent portion being hooked on a protruding portion protruding to a palate side in the bracket, the bracket includes: a first slot for receiving an arch wire and determining a relative position to the arch wire; and the protruding portion for engaging with the traction member and determining a relative position to the traction member, wherein the bent portion is hooked on the bracket at the protruding portion. a base member fixed to two or more screws implanted in a vicinity of median palatine suture of a palate bone; an arm-shaped arm member having a first connecting portion connected to the base member and a second connecting portion located in a vicinity of palatal side of a tooth; and a traction member that is made of a wire material which is elastic and pulls a tooth as a traction target (Tl), wherein the orthodontic appliance is characterized in that the traction member having: a traction base portion fixed to the second connecting portion; a traction fixation portion hooked on a bracket that is fixed to the traction target located away from the traction base portion; and a traction force generation portion that is located between the traction base portion and the traction fixation portion and applies a rearward traction force and a frontward rotational force or a frontward traction force and a rearward rotational force to the bracket via the traction fixation portion, a traction base portion fixed to the second connecting portion; a traction fixation portion hooked on a bracket that is fixed to the traction target located away from the traction base portion; and a traction force generation portion that is located between the traction base portion and the traction fixation portion and applies a rearward traction force and a frontward rotational force or a frontward traction force and a rearward rotational force to the bracket via the traction fixation portion, the traction fixation portion having a bent portion in which the wire material extending along dentition is plastically deformed and bent toward a tooth root side, the bent portion being hooked on a protruding portion protruding to a palate side in the bracket, the bracket includes: a first slot for receiving an arch wire and determining a relative position to the arch wire; and the protruding portion for engaging with the traction member and determining a relative position to the traction member, a first slot for receiving an arch wire and determining a relative position to the arch wire; and the protruding portion for engaging with the traction member and determining a relative position to the traction member, wherein the bent portion is hooked on the bracket at the protruding portion.