Abstract: An apparatus for applying deep, steady pressure into the deep tissue layers of the muscles of a human user and to "adjust" the vertebrae of the spine, to relieve back pain in a human user. The apparatus is comprised principally of a frame (36), that is collaspable and adjustable, and a back-engaging member (26), whereby a human user can support himself by resting his arms and hands on the arm-rest members (25), by resting his feet on the foot-rest members (32), and be leaning his back against the back-engaging member, and when the user pushes his body weight against said back-engaging member, and if he chooses, takes his feet off the said foot-rest members (32) to allow his feet to be suspended off the ground, the force of gravity as well as slight movement on the part of the user, causes the back-engaging member to apply a deep, steady, slowly sliding pressure into the muscles of the dorsal side of a user's body, relaxing and releasing muscle tension and effecting a spinal adjustment.