The present invention relates to an orthodontic fixing apparatus. The orthodontic fixing apparatus includes a linear fixing body having a plurality of connection grooves bisymmetrically defined in the left and right sides thereof, and a plurality of cylindrical fixing rings disposed on the upper and lower sides of the central portion of the fixing body using a connection member as a medium to insert screws respectively therein, to thereby fix the fixing body to the palate. Each of the fixing rings may protrude at a width of about 0.1 mm to about 4 mm in the direction in which the fixing rings contact the palate to minimize the contact area of the fixing ring or the fixing body with the palate. Also, the fixing ring may include a taper having a diameter that gradually increases from an inlet toward an outlet along an insertion direction of the screw and the female screw therein.; Thus, since the screw is firmly supported and inserted into the palate, the fixing apparatus may serve as a firm fixing point. Also, since the fixing apparatus is easily installed, the fixing apparatus is convenient to use. In addition, since the fixing apparatus is fixed while minimizing the contact area with the palate, it may prevent the palate from being damaged or prevent the palate from becoming infected.