PURPOSE: To provide a mobile telephone system capable of recognizing a following incoming call and grasping information from the caller of a following incoming call source without interrupting present communication when there is the incoming call from another equipment while a certain radio telephone terminal equipment is under speaking.

CONSTITUTION: When there is the incoming call from another radio telephone terminal equipment 4b, 3a or 3b while a radio telephone terminal equipment 4a performs communication through a base station 2a, the information of the incoming call is reported from an exchange 1 to the radio telephone terminal equipment 4a. In this case, corresponding to the request of the radio telephone terminal equipment 4a, the base station 2a transmits the incoming call information from the other equipment to the radio telephone terminal equipment 4a in the remaining time band for which another slot of present communication velocity is changed. Thus, since the radio telephone terminal equipment 4a receives the incoming call information and stores it in an incoming call information storage part 5a, even when the incoming call from the other equipment is generated during communication, the information from the call originating terminal equipment can be generated without interrupting the communication.