The present invention provides an ankle joint rehabilitation exercise device, wherein a foothold on which the foot of a patient is put is tilted towards front, rear, left, and right directions so that the muscles around the ankle joint are contracted and relaxed and the ankle joint is rehabilitated. To realize this, the ankle joint rehabilitation exercise device of the present invention comprises: a pair of main frames； a base installed on the top surface of the main frames； a motor installed on the base and operated by a power source applied from the outside； a rotary plate coupled with the shaft of the motor and rotated by the power of the motor； at least one support installed along the outer circumferential surface of the top surface of the rotary plate； a vertical cylinder installed to vertically penetrate through one side of the rotary plate； a tilting rotary plate put on the support to be able to be tilted and coupled with a rod of the vertical cylinder in one bottom surface side thereof, wherein the tilting rotary plate is tilted in front, rear, left, and right directions when rotated with the rotary plate by means of the rods being withdrawn and inserted by the operation of the vertical cylinder； a foothold installed on the top surface of the tilting rotary plate with a bearing therebetween, tilted to front, rear, left, and right directions with the tilting rotary plate while not receiving the rotary power of the tilting rotary plate, and bending or spreading the ankle joint of the patient； and a guide member installed on the front surface of the foothold and guiding the tilting motion of the foothold.본 발명은 환자의 발이 올려지는 발판을 전, 후, 좌, 우 방향으로 틸팅 동작시켜 가며 발목 관절 주변의 근육을 수축 및 이완시키도록 하여 발목 관절을 재활하도록 구성한 발목 관절 재활 운동 장치를 제공한다.이를 구현하기 위한 본 발명은 한 쌍의 메인프레임, 상기 메인프레임의 상면에 설치되는 베이스, 상기 베이스 위에 설치되며 외부에서 인가된 전원으로 구동하는 모터, 상기 모터의 축에 결합되며 상기 모터의 동력으로 회전 동작하는 회전판, 상기 회전판의 상면 외곽 둘레면을 따라 설치되는 적어도 하나 이상의 서포트, 상기 회전판의 일측에 수직으로 관통한 상태로 설치되는 수직실린더, 상기 서포트 위에 틸팅 가능하게 올려지며 그 하면 일측에는 상
