Wireless communications terminal, communications protocol switching method, communications protocol switching program, and integrated circuit of wireless communications terminal

The present invention provides a wireless communications terminal capable of preventing radio interferences from being caused by other wireless communications concurrent with a contactless communications. A wireless communications terminal ( 101 ) receives, in a contactless communications, a command from a reader/writer ( 105 ) via a second wireless communications section ( 209 ), and analyzes the received command. The wireless communications terminal ( 101 ) controls a wireless communications control section ( 210 ) to deactivate or temporarily deactivate the function of a first wireless communications section ( 208 ) depending on the analysis of the command. After the function of the first wireless communications section ( 208 ) is deactivated or temporarily deactivated, the wireless communications terminal ( 101 ) accesses a memory area of an IC card microcomputer system ( 300 ) as specified by the command to perform a contactless communications.