Abstract: A vehicle anti-theft device has a support to be arranged in an interior of a vehicle in the vicinity of a gas pedal, and a locking part arranged on the support and having a locking body provided with an opening and a locking element movable relative to the locking body between a locked position in which it reduces a size of the opening and an unlocked position in which it releases the opening, so that in the unlocked position the device can be moved over a gas pedal of the vehicle and a holding arm of of the gas pedal, while in the locked position with reduced size of the opening the device cannot be removed from the holding of the gas pedal since the size of the opening in the locked position is smaller than the size of the gas pedal, and therefore the gas pedal cannot be activated to drive a vehicle.