To provide a communication terminal capable of eliminating the time and labor for inputting a schedule in an opposite party, thereby enhancing the availability of a schedule function by automatically registering a decided schedule into the communication terminal of the opposite party by utilizing a mail function.

In this communication termina, a mail transmission/reception function for transmitting and receiving data through a telecommunication line and a schedule management function for storing each action schedule for specified date and time by a file data form are provided, conditions relating to the mail transmission/reception function and the schedule management function are displayed on a display 42, and a control circuit 36 transmits file data relating to the action schedule of the specified date and time in the schedule management function to a specified opposite party by an attached file form by utilizing the mail transmission/reception function.