The present disclosure relates to a portable therapeutic exercise device and more particularly a convenient exercise device, which is particularly adapted for restoring and/or maintaining the range of motion of post-operative patients and also having general therapeutic use. The disclosed device has several significant and novel improvements over prior art devices. Several improvements have resulted in a device which is much easier and less expensive to produce, lighter, more convenient to transport and to store. The device has a lightweight base frame, and a moveable carriage connected thereto. A plurality of elastic members couple the base to the carriage to supply resistant force while in operation.