When securing a frame (7) made of a rigid member for carrying a heavy object such as a drive unit (3) for a walking assistance device on the hip of a wearer, a hip protective belt (4) made of fabric is wrapped around the hip of the wearer, and the frame (7) is secured thereon via a flexible plate (5) and a pressure plate (6) located on an outer side of the flexible plate (5) and having a higher rigidity than the flexible plate (5). The intermediate members allow the wearer to feel the rigidity of the frame in a mitigated manner, and the wearer would not experience any discomfort from the pressure of the frame even when the posture of the wearer is changed. The hip protective belt can readily conform to the body contour of the wearer, but the frame would not deform. Because the intermediate members absorb the difference in the builds of different wearers, the frame may come in a small number of different sizes to fit almost any wearer allowing the hip support member can be mass produced at low cost.