A wireless communication network system comprising: mobile radios (VRS1, VRS2) that are mounted on a moving body moving along a predetermined route; and a plurality of immobile radios (WRS1-WRS7) that are spatially separated and arranged along the route, adjacent immobile radios (WRS1-WRS7) wirelessly communicating with each other, to transmit information from a transmission source to a terminal immobile radio by relaying the information, wherein the mobile radios (VRS1, VRS2) and the immobile radios (WRS1-WRS7) communicate with each other by a time division multiple access method, in which time synchronization is performed to allow each of the mobile radios (VRS1, VRS2) and the immobile radios (WRS1-WRS7) to communicate in an allocated time slot, the wireless communication network system characterized in that the mobile radios (VRS1, VRS2) are disposed on front and rear parts of the moving body, the wireless communication network system characterized in that the mobile radios are capable of communicating with each other, wherein when information propagation between immobile radios (WRS1-WRS7), which are capable of wirelessly communicating with each other, is inhibited by the moving body existing therebetween, the information propagation between the immobile radios (WRS1-WRS7) is relayed by the two mobile radios (VRS1, VRS2) mounted on the moving body, wherein during one period of a communication operation of the communication network, is provided a relay time slot block including a plurality of time slots as a relay communication time period for relaying the information propagation between the immobile radios (WRS1-WRS7) by the two mobile radios (VRS1, VRS2), wherein when a relay operation command is generated, there are performed in an allocated time slot in the relay time slot block in a time division manner an information receiving operation of one of the mobile radios (VRS1, VRS2), which is closer to an information transmitter immobile radio, a communication operation from the one mobile radio to the other mobile radio, and an information transmitting operation of the other mobile radio to an information receiver immobile radio. mobile radios (VRS1, VRS2) that are mounted on a moving body moving along a predetermined route; and a plurality of immobile radios (WRS1-WRS7) that are spatially separated and arranged along the route, adjacent immobile radios (WRS1-WRS7) wirelessly communicating with each other, to transmit information from a transmission source to a terminal immobile radio by relaying the information, wherein the mobile radios (VRS1, VRS2) and the immobile radios (WRS1-WRS7) communicate with each other by a time division multiple access method, in which time synchronization is performed to allow each of the mobile radios (VRS1, VRS2) and the immobile radios (WRS1-WRS7) to communicate in an allocated time slot, the wireless communication network system characterized in that the mobile radios (VRS1, VRS2) are disposed on front and rear parts of the moving body, the wireless communication network system characterized in that the mobile radios are capable of communicating with each other, wherein when information propagation between immobile radios (WRS1-WRS7), which are capable of wirelessly communicating with each other, is inhibited by the moving body existing therebetween, the information propagation between the immobile radios (WRS1-WRS7) is relayed by the two mobile radios (VRS1, VRS2) mounted on the moving body, wherein during one period of a communication operation of the communication network, is provided a relay time slot block including a plurality of time slots as a relay communication time period for relaying the information propagation between the immobile radios (WRS1-WRS7) by the two mobile radios (VRS1, VRS2), wherein when a relay operation command is generated, there are performed in an allocated time slot in the relay time slot block in a time division manner an information receiving operation of one of the mobile radios (VRS1, VRS2), which is closer to an information transmitter immobile radio, a communication operation from the one mobile radio to the other mobile radio, and an information transmitting operation of the other mobile radio to an information receiver immobile radio.