To provide a tire cover which serves as an air jack, by which the used range of the tire cover is expanded and the value added is given.

A bag body 11 is formed out of flexible and airtight members capably of being folded into a cup-shape and expanded by injecting gas, the bag body 11 is formed into a cup-shape of size capable of receiving a tire 4 at being folded up and being formed with a folding back part 20 surrounding the side face of the back of a tire 4, and the base part of a connecting hose 12 having an exhaust connecting part connected to the exhaust pipe of a vehicle body is fitted to the bag body 11.