Abstract: A wheel immobilizing apparatus includes a pair of wheel-blocking bodies, and an adjustable spacing mechanism and a latching mechanism for accommodating different wheel sizes. The wheel-blocking bodies are wedge-shaped to fit against respective rear and front ends of a wheel. Each body has an inner flange fixedly attached to an inner portion of the body and projecting therefrom to assume an overlapped relation with a peripheral portion of an inner side of the wheel to prevent removal of the body in a direction toward an outer side of the wheel. Also, each body has an outer bracket fixedly attached to an outer portion of the body and projecting therefrom to assume an overlapped relation with a portion of an outer side of the wheel.