Abstract: This invention relates to a fitting structure of spikes or the like for sport shoes. A joint nut or joint bolt meshing with a nut portion of a fitting base and meshing, on the other hand, with a fitting nut or bolt is interposed when spikes or the like are removably fitted to the fitting base buried in and fixed to the sole of the bottom of the shoes main body, in order to enlarge the fixing contact area of the spike or the like and to improve fixing strength. The joint nut or bolt first undergoes deformation prior to the fitting base when the load deformation force acting on the spike portion is received, the load to the fitting base is thus reduced and durability can be improved. The damaged joint nut or bolt is replaced by a new one.