Concentrator and reset control method therefor

There is provided a concentrator and its reset control method that may easily and reliably secure early restoration from an outage of network communications. A concentrator to which a plurality of network devices are connectible includes a communication control part for controlling a transfer process of information among the network devices, a condition determination part for determining whether information obtained from the communication control part satisfies a reset condition, and a reset control part for controlling a reset signal used to reset the communication control part based on a determination by the condition determination part.