PURPOSE: To prevent that a message to itself is listened to by another user.

CONSTITUTION: Plural areas for a master set, a slave set or a common use is provided to a memory section 16. A selection signal coming from a telephone line is detected by an area detection section 8, an area designation section 10 selects an area of the memory section 16 in which a message is to be recorded and the message coming from the telephone line is recorded in the area. For example, when the message is reproduced by a slave set 2, a key entry section 26 is operated and a reproduction instruction is sent to the master set 1 through a radio line and a recording and reproduction control section 15 controls a voice conversion section 17 in response thereto to reproduce the message recorded in the area for the slave set and the common use of the memory section 16 and the reproduced message is sent to the slave set 2, in which the message is reproduced.