A load distribution system that can further reduce load on a single apparatus and a network and that can distribute load for each process. The load distribution system of the present invention comprises: at least one packet forwarding apparatus comprising a packet forwarding unit that forwards a packet by using a forwarding rule sent from a flow control apparatus and a flow end check unit that detects a flow end; a load distribution apparatus that determines a load distribution destination from among a plurality of service provider servers by referring to a flow end notification sent from the flow control apparatus; and a flow control apparatus comprising a flow route setting unit that determines a forwarding route for a flow using a service provider server determined by the load distribution apparatus and notifies a packet forwarding apparatus on the forwarding route of a forwarding rule realizing the forwarding route and a flow end determination unit that notifies the load distribution apparatus of a flow end, based on flow end information detected by the packet forwarding apparatus.