A technique to acquire well-balanced multicast communication quality of each terminal on the basis of the multicast communication request from a plurality of terminals is provided. A multicast proxy apparatus comprises a server manager for management of communication bandwidths corresponding to each content and addresses of servers for providing contents of the communication bandwidths, a terminal manager for management of weight or priority order of each terminal, and a server selector for receiving content transmission requests from each terminal, acquiring the information of at least one bandwidth regarding distribution of the content, and selecting a content server on the basis of the remaining available bandwidths and weight or priority order of the terminals.