A control unit 102 of a mobile telephone 10 sets a radio wave mode to ON or OFF, and stores the setting of the radio wave mode internally. ON shows that radio wave transmission is permitted, and OFF shows that radio wave transmission is prohibited. When the stored radio wave mode setting is OFF, radio wave transmission is suppressed even if input such as that for mail transmission is received. By setting the radio wave mode to OFF, functions that do not require radio wave transmission can be used, even in places where radio wave transmission is prohibited.