A wireless access point apparatus which is capable of configuring an efficient transmission frame for a plurality of wireless communication terminals connected to or accommodated in the wireless access point apparatus, and therefore flexibly coping with the plurality of wireless communication terminals having various communicating functions. A data transmission area including a non-collision area capable of exclusively using a wireless medium and a collision area where random access communication is carried out is set in a data transmission frame. It is determined whether or not a specific wireless communicating apparatus has been connected to or accommodated in the wireless access point apparatus, and the data transmission area is changed according to the determination result. Information indicative of a new data transmission area is sent to wireless communication terminals connected to or accommodated in the wireless access point apparatus, including the specific wireless communicating apparatus.