Abstract: A nailess horse shoe having a cup shaped configuration open at the rear part, molded of flexible plastics or polyurethyne material having a forwardly extending slot shaped opening in the bottom. A sponge rubber sole is provided on the lower surface on the bottom of the shoe and clamping or tightening members in the form of rod members extend between the lateral side walls and are provided with tightening nuts to draw the lateral side walls towards each other into clamping engagement onto the horse's hoof. A sock is insertable between the hoof and the inner surface of the shoe and a device for attaching weights is provided on the front of the shoe.