To easily and simply mount and demount a non-slip tool on and from a tire and mount the non-slip tool without lifting a car body.

To simply mount a non-slip tool to eliminate time and labor required for lifting of a car body, a wheel rim is utilized. A through-groove 1 is formed in the outer peripheral end of a wheel rim 9, the claw of the non- slip tool hooks the through-groove and firmly fixed on a tire surface through the expansion and contraction force of a spring. Further, a rubber ring-form fixing auxiliary material is arranged at the outer peripheral part thereof and the claw of the non-slip tool hooks it to fix the non-slip tool.