Abstract: A shaping apparatus for the working/maintenance of a snow-boarding half-pipe. The apparatus comprises a framework with a curved portion serving to support and guide a pair of drive chains actuated to run over an endless path. To the drive chains are attached scraper elements adapted to extend perpendicularly outward from the endless path of the chains, the scraper elements being designed to cut away snow from the half-pipe surface to be shaped. The scraper elements further incorporate elements serving to move the detached snow along the shaped surface and to smooth the surface. The apparatus is intended for attaching to a self-actuated vehicle, to be powered therefrom.