To provide a protection device capable of protecting a tire side wall from a connection location of a tire chain and a side chain, being manufactured with low cost, and being installed in a simple manner.

A sidewall protection cover 11 to store a chain member of a side wire 6 situated against on a sidewall 3 is mounted. The sidewall protection cover has a U-shaped body. The body is preferably one piece and has two wings that are connected along a spine, wherein the wings enclose a space for accommodating the chain member, and at least one of the wings has a holding element, on its side that faces inward, in the form of a projection for holding the chain member and/or a connection element 5 suspended on the chain member in place between the wings.