A communication device for observing a channel state in a plurality of links is provided. A communication device that performs wireless communication using a plurality of links includes a first transmission unit that transmits a first signal including information regarding start of observation of a channel state in part of the plurality of links, and a second transmission unit that transmits a second signal inducing a signal including information regarding observation of a channel state in one or more links among the plurality of links. The first signal includes information regarding a link for performing the observation and information regarding a third signal for another communication device to observe a channel state.