A network converter connected to an information processing device and a storage device so as to be communicable including a conversion table storage section which stores combinations of iSCSI names of the information processing device and the storage device and WWNs (World Wide Name) of the information processing device and the storage device in a conversion table, a first identification number conversion section which converts the iSCSI names into the WWNs according to contents stored in the conversion table, and a second identification number conversion section which converts the WWNs into the iSCSI names according to contents stored in the conversion table.