To further promote reduction of cost and to easily mount an antiskid tool for a tire on the tire.

This tool has a non-mental antiskid tool main body 2 capable of winding around an outer periphery of the tire. This antiskid tool main body 2 presents a connection shape body by a plurality of net groups 2A and 2B. An opening part 7 is provided in a part corresponding to a tread surface of the tire T between mutually adjacent net constituting pieces 3 for forming the net groups 2A and 2B within each of the groups 2A and 2B. The adjacent net constituting pieces 3 with each other are integrally connected in a part corresponding to a side part of the tire T. A stretchable outside fastening chord 16 provided at the outside of a width direction of the antiskid tool main body 2 is divided into a plurality of divided chords 20A, 21A, 20B and 21B and each one end part of the divided chords 20A, 21A, 20B and 21B is integrally connected to the antiskid tool main body 2.