Abstract: A bumper for attachment to a leg of an offshore platform comprising an upright, bumper holding element which carries resilient bumper members. A first arm projects outwardly from the upright element above the water line for fixed attachment to the leg of the platform above the water line. A second, submerged arm projects outwardly from the upright element and is pivotally connected below the water line to the leg. This structure allows the bumper to be quickly and efficiently replaced with a minimum amount of diver time required. The bumper is easily positioned in a vertical orientation regardless of the slope of the platform leg, and all welding is performed above the surface of the water.