a cargo pallet made of synthetic resin includes : a top plate and a bottom plate , each plate constituted by bonded stacked synthetic - resin boards cut into a specified shape and size ; and spacers bonded between the top plate and the bottom plate which are arranged in parallel and separated by the spacers . each board is constituted by two sheets with an inner cavity layer interposed between the two sheets . in an embodiment , ribs connecting the two sheets of one board are aligned in parallel in a first direction , and ribs connecting the two sheets of another board stacked on the one board are aligned in parallel in a second direction which is perpendicular to the first direction . the spacers are elastic spacers made of synthetic resin and having spring elasticity in a height direction .