To provide a wireless base station capable of obtaining throughput similar to the packet of the large size, even if communication service using a protocol for making a reservation for a wireless channel is performed, and to provide its wireless relay method.

Each of wireless stations 18-26 is made to have a relay function with respect to adjoining wireless stations, by lapping the communication ranges of the adjoining wireless stations over each other respectively, judges the existence of an encapsulated packet by an analysis by a packet analysis 52, decomposes the encapsulated packet by a packet release 54 individually, searches for a packet addressed to the same wireless station on the basis of route information which a routing table 56 stores and destination information which the packet has in a relay controller 58, integrates a plurality of detected packets addressed to the same wireless station into one packet by a capsule former 62 in accordance with the detection of the plurality of packets, and transmits it to the adjoining wireless stations.