To provide an information storage server and an information storage program capable of improving usability and convenience.

For offering a service for transmitting contents, which are designated by a user and stored in a content storage part, to a content output terminal by an output request from the user, this information storage server performs authentication based on authentication information, which is notified when the user uses a predetermined main authentication information notification function according to a predetermined usage procedure, and if affirmative authentication result is obtained, offers the contents to the user via the contents output terminal. The information storage server is provided with a substitutional authentication receipt part for receiving authentication by a sub authentication information notification function different in at least either of the authentication information itself or the usage procedure from that for the main authentication information notification function when the main authentication information notification function cannot be used.