Abstract: An antislip apparatus is provided for footwear to be fit on a region of a sole and/or a heel of a shoe defining an engagement surface in contact with the ground surface. The antislip apparatus includes a ground gripping structure for engaging the ground surface including a support and crampon-like prongs disposed on the support extending perpendicularly from the support. A cam arrangement interacts with the support for moving the prongs to one of a grip position with the prongs extending beyond the level of the engagement surface, or to a rest position with the prongs disposed inwardly of the engagement surface. The cam arrangement includes a plate disposed substantially parallel to the support and cams acting on one of the support and the plate to vary a distance between the support and the plate to move the prongs. An operating arrangement or actuator is provided for operating the cam arrangement. The actuator includes a cylindrical rotor formed integral with the plate.