Abstract: A mounted, retractable step for motor vehicles, such as passenger vans, that slides into an extended position for assisting entrance into the side of the passenger van. The step is mounted on the ends of a pair of square rods that slide horizontally under the passenger van. The rods are carried on an outer guide and between a pair of spaced-apart inner guides. The outer guide is attached to a pair of outer guide supports mounted to the edge of the underside of the van. The inner guides are attached to an inner guide support mounted to the underside of the van. Each of the rods has a pair of guide stops, in the form of nipples extending downwardly from the bottom side of the rods, that lock the rods into an extended position and a retracted position depending on which guide they straddle. The step is moved from the retracted position to the extended position by lifting the step slightly and then sliding it out from under the passenger van.