Abstract: A device for use as a bed or bedstead or a mattress in its entirety or as a combination of a bedstead and a mattress. A sleeping mat or a bed quilt is placed on the device arranged as a bedstead and may or may not be placed on the device arranged as a mattress alone or as a combination of the bedstead and mattress. A horizontal passage is provided within the device for communicating with an area of the sleeping mat or the upper mattress surface and with a vertical passage provided to one end of the device and having an air discharge opening for providing an air circulation through the bed inside with a zone of the sleeping mat or the upper mattress surface and the interior space of the bedroom.