A wireless network apparatus and a method for controlling the transmission rate of the same, whereby a receiver side is capable of constantly maintaining the full transmission rate by coordinating the maximum number of packets to be sent to the network from a sender side. Further, a wireless network apparatus including a time interval calculating unit to calculate the time intervals of received packets, a receiving mode determining unit to determine a receiving mode to receive packets according to the calculated time intervals, a packet determining unit to calculate a period during which the determined receiving mode is maintained, and a maximum packet determining unit to determine the maximum number of packets which can be sent to the network by a device, according to the number of packets consecutively received during the calculated period.