To provide a schedule notifying system capable of calling a portable telephone or a fixed-line telephone of a voice message according to the start time of an event managed by a scheduler and the like and of using a speaker's voice selected by a user for the voice message.

A schedule inputting person registers schedule data in order to transmit the voice message to a schedule notice server 13 from a PC 11, a portable telephone 12, etc. The schedule data include the time of origin of the voice message, an address, text data of a message to be read out, the kind of voice specifying a specific speaker, and the like. The schedule notice server 13 creates a voice synthesis file read out with the speaker's voice of which text data is specified. When a predetermined time comes, the system calls the portable telephone 14 or the fixed-line telephone 15 of the specified address, and it reproduces the voice synthesis file and notifies the message.