Abstract: The present invention is directed to a simple, inexpensive wheel lock suitable for use with many single or multiple wheel casters. Generally speaking, a known conventional caster has an integrally formed frame including a caster holder that has a curved fender and one or two wheels positioned below the curved fender. A wheel lock according to an embodiment of the present invention is a curved piece of semi-rigid material that fits tightly enough into the space between the fender and the wheel to prevent the wheel from rolling. The wheel lock can be made to have an optional tab on the outer edge that permits easy positioning of the wheel lock and facilitates its removal.