In this study, we developed a device for the purpose of assist of the rehabilitation. The method of the rehabilitation includes what's called mirror therapy. Mirror movement can expect an effect as rehabilitation of the symptom of hemiplegia. Therefore we developed the device which caused an illusion that a paralysis limb moved the arms because a reflected image let you exercise in this study. Because without using power, the structure of the device is simple and it is easy portable device. It is the structure that is relatively small because we use synchronous belt, linear guide and a pulley for mirror movement.