PURPOSE: To communicate as desired regardless of a legal restriction, and to control the influence of a communication fault by providing plural pairs which consist of one MODEM and one antenna as the unit of one pair with the communication device of a ground side.

CONSTITUTION: A guide line L for guiding a moving vehicle is laid along the driving path of a moving vehicle A at the ground side so as to bisect the driving path of the moving vehicle A right and left, and a work station ST is provided with the side place of the driving path. In order to communicate several control information with the moving vehicle A, a radio communication device 1 is provided with the ground side and the moving vehicle side respectively. As for the communication device 1, making one MODEM 2 and one antenna 3 as one pair, one pair is provided with the moving vehicle side, and two pairs are provided with the ground side so as to take charge of each communication area of the driving path bisected right and left.