To simplify connecting and separating work of antiskid bodies, and to simplify structure.

In this antiskid device, the antiskid bodies connected by being fitted into a tire of an automobile and being arrayed over the entire periphery are mounted with connecting members 11 and 12 on a front side and a rear side in outside parts, and a connecting tool for connecting the connecting members 11 and 12 on the front side and the rear side is provided. In the connecting tool, a cylindrical member 27 is provided in either one of a planar link 26 of the connecting member 11 on the front side and a planar link 36 of the connecting member 12 on the rear side, a shaft-like member 30 crossing and penetrating through the cylindrical member 27 is provided, the shaft-like member 30 is made movable forward and backward in an axial center direction, an elastic member 31 is provided to impart advancing force to the shaft-like member 30, and the other planar link is provided with connecting holes 37 and 38. During the connection, the shaft-like member 30 is retreated, the planar link with a connecting hole is inserted into the cylindrical member 27, and the shaft-like member 30 is advanced by elastic force of the elastic member 31 and is penetrated through the connecting hole of the planar link. During the separation, the shaft-like member 30 is retreated and is extracted from the connecting hole of the planar link, and the planar link with the connecting hole is extracted from the cylindrical member 27.