The invention concerns a compost container consisting of a number of ring-shaped container sections, constructed to be assembled, as well as of a ventilated base-plate and a lid. The purpose of the invention, to improve the air supply to the container's internal composting space, is achieved by a ventilation partition, a part of the base-plate, which together with the inside wall of the bottom-most container section and ventilation column to facilitate air supply to said internal composting space. The purpose of the invention is further achieved by ventilation openings and in the uppermost container section and the lid, respectively, which allow air to leave the container's internal composting space in a manner that can be adjusted by turning the lid.