Abstract: An orthopedic belt eases sacroiliac joint pain by compressing soft pelvic tissue against the sacrum and ilium, to support and immobilize the sacro-iliac joints. The belt consists solely of flat, woven webbing forming a band about four to six inches wide, and a fastening device at the front. The belt encircles the patient at the level between the anterior superior iliac spines and the greater trochanters of the femurs. It is fastened with enough tension to compress the soft tissue as desired. Ends of the band forming the belt are fastened together at an angle which is selected to pass the belt horizontally across the back and to accommodate the shape of the patient's hips. The ends of the band are cut off in a taper if necessary so that no square corners are exposed.