A relay apparatus (100) acting as an access point of wireless LAN watches a packet showing a request of starting communication among the packets to be relayed between terminal apparatuses (101,102) and records the identification information of the terminal apparatus included in the packet. When the number of the terminal apparatuses whose identification information is recorded exceeds a preset upper limit value, the relay apparatus disconnects a communication relating to the latest identification information by transmitting a disconnection command or discarding the packet. With this arrangement, deterioration of streaming communication controlled by an access point (AP) of wireless LAN can be prevented.