A wireless communication apparatus capable of operating in an ad-hoc wireless network allowing direct communication between wireless communication apparatuses without access point, the apparatus comprising: information acquisition means (301, 302, 303) adapted to receive broadcast data from a wireless communication partner apparatus included in an ad-hoc wireless network and to acquire, from said broadcast data, information of the wireless communication partner apparatus; and power control means for controlling transmission power of the wireless communication apparatus characterized in that said power control means sets in enabling or in disabling a transmission power control of the wireless communication apparatus for communicating in the ad-hoc wireless network according to the information acquired by said information acquisition means, wherein said acquired information of the wireless communication partner apparatus indicates: (a) the device type of the wireless communication partner apparatus; or (b) information whether the wireless communication partner apparatus has a function of enabling or disabling a transmission power control; or (c) the power supply type of the wireless communication partner apparatus; or (d) the remaining battery level of the wireless communication partner apparatus; or (e) a remaining time period of operability of the wireless communication partner apparatus; or (f) network address information of the wireless communication partner apparatus. information acquisition means (301, 302, 303) adapted to receive broadcast data from a wireless communication partner apparatus included in an ad-hoc wireless network and to acquire, from said broadcast data, information of the wireless communication partner apparatus; and power control means for controlling transmission power of the wireless communication apparatus characterized in that said power control means sets in enabling or in disabling a transmission power control of the wireless communication apparatus for communicating in the ad-hoc wireless network according to the information acquired by said information acquisition means, wherein said acquired information of the wireless communication partner apparatus indicates: (a) the device type of the wireless communication partner apparatus; or (b) information whether the wireless communication partner apparatus has a function of enabling or disabling a transmission power control; or (c) the power supply type of the wireless communication partner apparatus; or (d) the remaining battery level of the wireless communication partner apparatus; or (e) a remaining time period of operability of the wireless communication partner apparatus; or (f) network address information of the wireless communication partner apparatus. (a) the device type of the wireless communication partner apparatus; or (b) information whether the wireless communication partner apparatus has a function of enabling or disabling a transmission power control; or (c) the power supply type of the wireless communication partner apparatus; or (d) the remaining battery level of the wireless communication partner apparatus; or (e) a remaining time period of operability of the wireless communication partner apparatus; or (f) network address information of the wireless communication partner apparatus.