To detect trains, track circuits are generally used in railway signaling systems, which sometimes malfunction due to the rust of rails or for other reason's. Moreover, there are some problems in the maintenance of track circuits. Therefore, a train detection device using microwave balises has been developed. It features non-contact with the rail and capability of tracking train detection. This device has greatly improved functions of train detection and tracing, because trains equipped with ID-balises and the device individually detect trains by using the ID-balises in contrast to the existing track circuits that detect only the "existence (0)" or "non-existence (1)" of a train. Therefore, the function of this device makes the composition of train control system simpler and improves the safety of train operation. Moreover, the train control system can be constructed at low costs because logical devices are not needed for the car-borne equipment.