Binding unit for sports devices, in particular for a snowboard

A binding unit for a snowboard that permits an individual adjustment of angular position relative to the snowboard, includes, for fixing it to the snowboard, a substantially circular retaining disc, as seen in plan view, for a base plate of relatively large surface area. Coupling parts are mounted directly or indirectly on the base plate to provide a connection to a snowboard shoe which is releasable from the snowboard when the coupling parts are inactive or deactivated. At least one slide element on the retaining disc is displaceable between an extracted position, in which the at least one slide element at least partially covers the base plate, a portion of the slide element or elements projecting from a circular circumferential region of the retaining disc in the extracted position, and an inserted position, in which the at least one slide element does not at least partially cover the base plate.