Abstract: An independent, removable device which is capable of being attached to the leg above the ankle and to the external side of the footwear in a variety of ways prevents ankle injuries. The device comprises a strap (1 in every figure) which embraces the leg of the wearer, just over and around the ankle. At the ends of the strap there is a suitable system to close the strap. The upper end of a rigid or semirigid sheet (2 in every figure) is pivotally connected to the strap (1). The lower end of the sheet is inserted in a little box (4 in every figure), which is fitted to the side of the shoe. The connection of the sheet to the shoe also might be done through a screw which would be screwed on the shoe sole (8 in FIG.3).