To provide an anti-theft device for a vehicle having advantage that it is easy to fit, it is not difficult to find a place and good in appearance when removing it, in the anti-theft device for the vehicle of the type of restricting the rotation of a steering wheel.

In the anti-theft device for the vehicle preventing from theft, an anti-theft tongue is provided with a pushing rod, movable only when a key and its key are unlocked, set to a plate having the tongue of the same shape as that of the tongue plate of a seat belt for the vehicle, an anti-theft belt, which is made of a safety guard for preventing a tool from entering between the both, a steel wire and a metal chain, set to the anti-theft belt, when installing the anti-theft device in the steering wheel so that the vehicle is protected from a theft by inserting the anti-theft tongue in a seat belt buckle.