In order to experiment multiple networked Unmanned Air Vehicles (UAVs), it requires huge investment of the time and the resources to construct the experimental environment including UAVs, network, and flight controllers. Although there are the simulators that are specifically designed for network or UAVs' flight, there is no simulator that can efficiently simulate the network for the multiple UAVs in real-time yet. In this paper, we propose a distributed network simulator for multiple UAVs to efficiently simulate the network for multiple UAVs in real-time.