Disclosed is a vehicle-tire chock having a light-emitting portion that emits light to make the vehicle-tire chock visible outside the vehicle. The light-emitting portion is formed in the vehicle-tire chock so as to make the chock conspicuous, thus preventing negligent accidents in advance by enabling a vehicle driver to recognize the presence of the chock before getting into the vehicle, by enabling other vehicles or pedestrians to easily recognize a large parked or stopped vehicle, and by enabling the vehicle-tire chock to be easily visible at night.