There is provided a communication apparatus capable of reducing power consumption. The communication apparatus in accordance with the present invention includes a synchronization detection block 30 which detects synchronization by performing a receiving process using a plurality of clocks whose phase differs from each other with respect to synchronization information contained in a first frame as well as identifies the synchronization detected clocks as candidate clocks to be selected; a clock phase selection block 40 which selects a sampling clock to be used for sampling of the transmission signal from the candidate clocks to be selected, selects a stop clock separated by a predetermined phase from the selected sampling clock, and outputs an instruction for the stop clock; and a clock gate unit 60 which, terminates supplying the stop clock from the plurality of clocks to the synchronization detection block 30 as well as supplies other clocks to the synchronization detection block 30. In the process of receiving a second frame following the first frame, the synchronization detection block 30 detects synchronization from the clocks other than the stop clock.