An apparatus for performing lumbar stretching treatments comprises a supporting structure where at least one electric motor vertically moves leg supporting members. A person that needs performing lumbar stretching treatments takes the right position at the apparatus and autonomously controls it powering the vertical movement of the leg supporting means which put into traction the lower section ofthe person's back. The apparatus may also be installed on specific beds having a lay surface horizontally translatable in order to improve the comfortable use of the apparatus.