A reading apparatus reading information from an RFID tag attached to a commodity configured to comprise: a casing consisting of an opening serving as an entrance and exit port of a commodity and a space for housing the commodity inside; an antenna configured to be arranged inside the space; an opening and closing lid configured to open and close the opening; an acquisition module configured to acquire an opening and closing state of the opening and closing lid; a reading module configured to execute, in a case in which the opening and closing state acquired by the acquisition module indicates a closing state of the opening and closing lid, a reading processing for reading information relating to commodities from RFID tags of each of the commodities housed in the casing through the antenna; and an output module configured to output the information read by the reading module.