A portable communication terminal device includes a section for detecting a call from a calling party; a section for obtaining position data for a present position of the portable communication terminal device; a section for storing data of a plurality of areas and a plurality of messages to the calling party, which respectively correspond to the areas; and a section for performing a determination when the call is detected. In the determination, it is determined whether the present position based on the position data belongs to one of the plurality of the areas stored in advance. The terminal also includes a section for performing message transmission when it is determined that the present position belongs to one of the plurality of the areas. In the message transmission, one of the plurality of the messages is transmitted, which corresponds to the one of the plurality of the areas.