Abstract: Embodiments of a locking wheel chock apparatus are disclosed for use with recreational vehicles, travel trailers and boat trailers having dual axles. The chock apparatus functions not only to hold a trailer in position, but also to limit the rocking or rotational movement of tire and wheel combination where a recreational vehicle or travel trailer is used for camping, i.e. living conditions. The chock apparatus generally comprises a pair of metal chocks, which are movably linked together by a screw driven mechanism for tightening and loosening the chocks about the tread area of adjacent tires. The chock assembly is capable of being reduced to a small package to facilitate storage and transportation when not in use.