A repeater device that achieves remote activation without fail by increasing the probability of an activation instruction frame reaching a to-be-activated communication device. The repeater device includes an activation signal generation unit that generates an activation signal, which activates a first communication device, when a frame, which is to be transmitted to the first communication device that is one of communication devices connected to a network managed by the repeater device, is received and when the first communication device is not in operation; and an annunciation signal generation unit that generates an annunciation signal, which sets up a non-communication section in which no communication takes place for a certain period of time with a communication device connected to the network. The repeater device sets up a non-communication section using an annunciation signal, and transmits, with the non-communication section set up, an activation signal.