There are realized a printing medium, a printing-medium unit, a printing system, a consumption-amount managing server, a consumption-amount managing system, and a consumption-amount managing method, which enable effective use of media-supplier information which relates to a media supplier that supplied the printing medium and which is recorded on a memory. A printing medium comprises a memory for recording information to be read into a printing system, and media-supplier information relating to a media supplier that supplied the printing medium is recorded on the memory.