Abstract: Proposed is a rehabilitation exercise device for upper and lower limbs. The rehabilitation exercise device is characterized by including: a first support supporting a user's hand or foot; a second support supporting a user's forearm or calf; a pair of first hinges rotatably connecting the first support and the second support to each other; a third support supporting a user's upper arm or thigh; a pair of second hinges rotatably connecting the second support and the third support to each other; a drive module selectively mounted on any one of the pair of first hinges and the pair of second hinges, and configured to pivot the first support or the second support; and a mounting position detecting part detecting a mounting position where the drive module is mounted from among the pair of first hinges and the pair of second hinges.