Abstract: Wireless LAN (Local Area Network) terminals are provided for executing a four-way handshaking procedure when they communicate with one another directly in a wireless ad hoc network mode. Each of the wireless LAN terminals may include a state processor which takes action in accordance with a communication state of its own wireless LAN terminal, and, upon sending a message during the four-way handshaking procedure, issues sending-completion information that indicates completion of the sending. The terminal may further include a state manager which, based on the sending-completion information, causes the communication state to be in a waiting state so that even during the four-way handshaking procedure, a message in processing procedure other than the message sent during the four-way handshaking procedure can be sent and received.