PURPOSE: To secure a tire antiskidding device that is able to check any bulkiness in time of storage by separately constituting an antiskid arm and a device body, requiring no parts including an attachment or the like on the inside of a tire wheel, and easily detachable.

CONSTITUTION: In this antiskidding device, a device body 3 and an antiskid arm 5 are separable from each other, and this antiskid arm 5 formed with plural pieces of wedge-form connecting pieces in the device body 3 to be attached to the side of a tire wheel 13 is inserted into a connecting hole part provided with a connecting plate 17 attached tight to these wedge-form connecting pieces 18 in an inner part of the device body 3 and connected thereto.