To improve workability at the time of mounting a device and stabilize fastening parts after the mounting by arranging beltlike short-circuit members between fastening members adjacent each other, constituting the short-circuit members by a connecting arm part extending in the direction in which adjacent fastening ends each other are connected and having a rotating member provided with a specified engagement part by a variable member.

This device has a quadri-sected non-metallic antislipping main body 2 connected by joint hooks 3, 3' at four portions on the outer periphery of a tire 1. Both of the joint hook 3' parts at two portions of these hooks 3, 3' can be mounted and removed. At first, the antislipping main body 2 is temporarily fastened to the tire 1. At this time, rotating members 7 of fastening tools with four boosters are made free states. Lastly, the joint hooks 3' are latched, the rotating members 7 of the fastening tools with boosters at four portions are rotated, the rotating members 7 are set to fastening states and the fastening are completed. Thus, space between fastening tip parts 11, 11 is narrowed, a continuous closed loop is formed, the fastening parts are integrated and the fastening parts are fixed to the tire 1.