To support antiskid bodies on a tire by patch members even if a lower part of the tire in an automobile is flatly deformed by being grounded.

In this antiskid device, the antiskid bodies 1 having U-shaped cross sections are fitted to the tire and arrayed at the entire periphery of the tire. Each of the antiskid bodies 1 is provided with front side and rear side U-shaped members 2 and 3 and an inside linear member 4. In both the U-shaped members 2 and 3, inside parts are connected by the inside linear member 4, and front side and rear side connecting members 21 and 22 are mounted to the outside parts. The connecting member at the rear side of the antiskid body is connected to the connecting member at the front side of the rear and adjacent antiskid body. Connecting plates 11 and 13 are interposed between outside parts of the U-shaped members 2 and 3 and the connecting members 21 and 22. The connecting plates 11 and 13 are provided with the outside patch members 16 and 18. Connecting plates 12 and 14 are interposed between the inside parts of the U-shaped members 2 and 3 and the inside linear member 4. The connecting plates 12 and 14 are provided with inside patch members 17 and 19. The antiskid device is provided with a member 61 for regulating the rotation of the connecting plates 12 and 14 to a tire inner peripheral side to limit the movement of the patch members 17 and 19 to the tire inner peripheral side.