Abstract: Traction apparatus for treating vertebral problems comprising a tripod type self-standing support having a block and tackle unit suspended from the tripod apex. The lower block includes a T-bar upon which triangular cushions are supported for location under the knees of a supine patient, and a torso encircling belt includes a strap passing through the patient's legs adjustably attachable to the lower block. The block and tackle tension member includes a tail passing from the upper block to the patient permitting the patient to raise and lower the leg supporting cushions to adjust the degree of back tension being achieved, and a lock mechanism mounted on the upper block permits automatic positioning of the degree of leg lift as determined by the tension produced in the block and tackle tail by the patient.