To provide a non-skid tool for a tire which allows easy mountability on the tire and cost reduction, and is improved in appearance when the tool is mounted on the tire.

The non-skid tool for the tire has a metal non-skid tool body 2 divided into net component pieces 2A and 2B in the longitudinal direction, and an opening part 6 is maintained between divisions by an inner tightening wire 3 to be held on the inner side of the width direction. A joint strip piece 10 having a hole 13 for joint closer to the outer side in the width direction is provided on opposing end parts into the opening parts 6 of the net component pieces 2A and 2B. A reinforcing piece 16 with its length set so as to be brought into surface contact with an outer side wall part of a tire 101 in a tightened condition when wound around the outer circumference of the tire, is bridged over inner corner parts in which the joint strip piece 10 and a net part are adjacent to each other on the outer side in the width direction in the net component pieces 2A and 2B.