PURPOSE: To display messages while being classified for each plural addresses and to read out them by displaying the message at a selected address by the switch operation for address selection in the order of the newest message.

CONSTITUTION: A reception section 101 demodulates a received radio signal and detects its own address in the received data signal, then the address and the message data succeeding to the address are outputted to a control section 106. The control section 106 stores the received address and message in pairs to a RAM 102 in order. When the 1st switch 104 for address selection is depressed, the control section 106 selects addresses in the order of A→B→C→D→A→..., reads out the newest message in the address from the RAM 102 and displays the result to a display section 103. On the other hand, when the 2nd switch 105 for message selection is depressed, the control section 106 reads out the newest message from the selected addresses from the RAM 102 in order and the result is displayed on the display section 103.