An orthodontic bracket having a slot formed by arm parts facing each other in the vertical direction, and an inner part, inserted into the slot, having a socket for holding a wire is disclosed. The shape of the socket is designed for applying desired forces to a tooth through the wire when the bracket is attached to the tooth. Forces can be changed simply by changing the inner part replacing the bracket attached to the tooth. When the inner part is inserted into the slot, the inner part closes the slot and it is held in the position by the arm parts enabling the wire to be securely held in its position.
