The claimed invention is directed to a communication apparatus which comprises a monitor unit that monitors communication conditions with a plurality of networks; a setting unit that performs adjusting and setting a communication timing to communicate with each of the plurality of networks in accordance with the communication condition of each network and notifying the plurality of networks of information about the set communication timings; and a communication unit that switches communication to each of the plurality of networks on the basis of the setting of the communication timings, wherein said setting unit dynamically changes the communication timing on the basis of the communication condition monitored by said monitor unit.