To provide a queue management system which immediately responds to the request/return of queue addresses that simultaneously come from plural ports by providing a buffer in each port without accessing a memory and can simultaneously responds the request and return of a queue address.

This queue management system managing the address of a memory in which data are stored with a queue structure is provided with a queue accessing part 1 which performs access to a memory 6 in accordance with a return queue or a request queue, a buffer 2 for return which is provided between a return queue port 4 and the part 1 and holds the return queue and a buffer 3 for request which is provided between a request queue port 5 and the queue access part and holds the request queue.