Abstract: A motion restraining brace apparatus for attachment to a patient's joint, such as across the knees or the elbows, to restrain the angle of motion of a brace. A base plate has a locking gear member rotatably attached thereto and having a plurality of locking notches along the edge thereof. A first restraining bar is rotatably attached to the gear and extends therefrom and a second restraining bar is fixedly attached to the gear and extends therefrom. A locking gear member has a locking pin movably attached to the base plate and positioned to move in and out of one gear member notch to lock the gear member to the base plate at a predetermined position to prevent rotation of the gear member relative to the base plate.