To provide an information linking system among portable terminals for exchanging information with other members by simple operation.

This information linking system for relating the information corresponding to the respective members in a site 1 accessed by the portable terminals M1 and M2 owned by registered members through a communication network is provided with a data base 11 for storing the individual information 23a and 23b of the respective members and specified information 22a and 22b updateable by an operation different from the one for the individual information corresponding to the respective members, a retrieval function 12 for extracting the specified information 23b corresponding to the other member matched with retrieval information relating to the specified information inputted from the data base 11 for an access from the member provided with the portable terminal M1 to the site 1 and a listing function 13 for providing the portable terminal M1 with at least identification information such as a nickname for identifying the member in the individual information 23b corresponding to the member provided with the extracted specified information 23b.