Abstract: This invention is for a foldable (FIG. 9) mobile step ladder (1) for vehicles. Two parallel protruding bars (3) enclose an upper part of the tire (2) and is fixated by urging the bars (3) toward the tire and the weight of the user is prevent from sliding away from the tire. When the support leg (5) is expanded there is a foot step (7) to be stepped on to make it easier for a person to get up to the platform (6). During use the cooperation between the bars (3) and the transversely extending bar (4) and the weight of the user on the platform (6) the bars (3) are fixated by the pressure against the tire so that it does not glide off. The support leg (5) stands on the ground without gliding on the ground since the step ladder (1) is fixated on the tire of the vehicle (2).