An information intermediary apparatus for communicating through a communication network with an information management apparatus having user information stored therein, the information intermediary apparatus, which includes: a first communication section for establishing communication through the communication network with the information management apparatus; a second communication section for communicating with a portable communication apparatus having identification information for identifying a user; an identification information-obtaining section, connected with said second communication section, for obtaining said identification information from said portable communication apparatus through said second communication section; a user information input unit, connected with said first communication section, for inputting user information for the user of the portable communication apparatus; and a data-identifying section, connected with said identification information-obtaining section and said user information input unit, for associating said identification information with the user information.