Abstract: A therapeutic appliance, namely a harness, has a belt, a suspender, a cross-support and an ischial pocket, which harness provides support for the sacroiliac area of a human patient. Use of the harness of this invention will promote resolution of low back pain attributed to sacroiliac strain. The waist belt has two belt ends. The suspender has a strap having two strap ends. The ischial pocket is stitched on the strap, the ischial pocket forming an ischial receiving area. The cross-support is attached to the strap at an acute angle thereto by a fixed cross-support end of the cross-support, the cross-support also having a free cross-support end. A first fastening means is included on the waist belt for fastening one belt end to the other belt end. A second fastening means is included on the strap for fastening the strap ends onto the belt and a third fastening means is included on the cross-support for fastening the free end thereof to the belt.