To prevent interference from occurring in an inspection, sightseeing guide, article explanation and the like by making a portable receiver small-sized and lightweight and further, enabling a dead channel to be visually grasped and confirmed beforehand.

In a main body 1 of the receiver, an integrated circuit which is initiated by an incorporated antenna and a battery, is packaged on a circuit board so as to display a channel and battery consumption. In the channel display, a display window 7 of a channel 6 being used received by the incorporated antenna is turned on by a light-emitting diode so that remaining turned-off dead channels 6 can be grasped and confirmed. A receiving position can be switched by a changeover switch 5, so that distribution of channels being used can be inferred and a search range can be widened. The inside of the main body 1 of the receiver is divided into a first block to dispose the circuit board therein and a second block to dispose a battery case 8 or a battery box therein.