The invention makes it possible to manage the wireless resources of each network even if network separation, disappearance, and recreation are repeated. The invention includes a management apparatus (104) which communicates with an AP (101) in the first network. The management apparatus (104) includes a reception unit which receives a message (M502) from some (111) of the communication apparatuses when some (111, 112) of a plurality of communication apparatuses form the second network, a management unit which manages information for forming the second network, and information on a network with which some (111, 112) of the communication apparatuses that have belonged to the second network should associate, and a transmission unit which transmits messages (M503, M505) containing the information for forming the second network to some (111, 112) of the communication apparatuses when the message (M502) is received.