Abstract: A method and apparatus for allocating resources using a directional beam in a wireless communication network is provided. A coordinator device calculates the number of flows able to be concurrently transmitted with each flow that is generated between the nodes and a transmission time of the each flow, and groups together the flows based on the calculation result. In addition, the coordinator device allocates resources to the respective nodes such that the nodes which generate the flows belonging to the same group can transmit the flows concurrently. Thus, the amount of the overall concurrent transmission can be maximized.