A digital radio broadcast receiver, a radio broadcast receiving unit and a digital radio broadcast receiving system are provided. Character information stored in a memory is displayed as image on a display device when such a condition that a vehicle speed is 0 km/h and a foot brake or a hand brake is on is satisfied, i.e., when a vehicle is halted or parked. Or, the character information stored in the memory is outputted as voice through a voice output device when such a condition that the vehicle speed is 0 km/h and the foot brake or the hand brake is on is not satisfied, i.e., when the vehicle is traveling.