Disclosed is a radio base station (eNB1) provided with a storage unit (130) for storing base station information for selecting the destination of a message, a network communication unit (140) for transmitting the message to another radio base station selected according to the base station information, and a control unit (120) for controlling the storage unit (130) to set as base station information the priority level of the radio base station to which the message was sent according to the state of response to the transmitted message.