Memory 42 stores conditions (schedule, position, and travel condition) for triggering switching to a manner mode. When any of the conditions is met, a CPU 33 requests a user for an instruction as to whether or not to switch to the manner mode according to the condition stored in the memory 42. In response to a user instruction for approvable of the switching to the manner mode, the CPU 33 executes control to switch the mobile phone to the manner mode.