An ATM repeater having an IP repeater function for packet communication system using address information based on the ATM communication system, and an ATM network including the repeater. The ATM repeater with a large capacity relays a packet at high speed without increasing the operating speed and processing capacity of the IP packet forwarding function of each ATM by providing a plurality of IP packet forwarding modules (120-1 to 120-N) to disperse the load on the forwarding sections.
