To provide communication terminal equipment for easily and accurately attaining communication by using an electronic mail.

In a portable telephone 100, attribute information for deciding the setting period of intimacy with the owners of the other communication terminal equipment is preliminarily set for each owner, and the setting period is changed based on the set attribute information, and a notice for announcing the necessity of the performance of communication by an electronic mail(mail data) with the other communication terminal equipment or a screen for transmitting the mail data to the other communication terminal equipment is displayed.