Abstract: Swivelable bindings assembly for a snowboard, for selective rotational adjustment of the bindings about an axis normal to the upper surface of the snowboard, the assembly including a rotatably adjustable bindings plate having a bottom surface, an upper portion adapted for releasably supporting a user's boot, and a relatively large diameter circular opening in the central portion of the plate. The assembly includes a holds-down disk that is received in the plate opening and is adapted to slidably engage edge portions of the plate opening to restrain the plate against upward separation from the disk and to hold the plate with its bottom surface slidably engaged with, and vertically supported by, the low-friction planar surface of a sheet of material secured to the top of the snowboard, the disk also serving to mount the plate for rotation about an axis through the center of the disk.