A service information receiving apparatus (1) for receiving scrambled charged service information transmitted as being multiplexed on an FM broadcast radio wave from an FM broadcasting station (3) causes a control section (43) to perform a predetermined arithmetic operation by using a variable key as one of descramble keys affixed to the scrambled charged service information received by a service information receiving section (40) and a half-fixed key as one of descramble keys, which is stored in an IC card (2) detachably attached to a receiving apparatus main body, thereby preparing a new descramble key, which is used to descramble the received charged service information.
