Wireless communication device, the switching method of a wireless communication system and a channel

A first communication control unit (100) and a second communication control unit (200) share one transmitting/receiving unit (50). Even during a time when the first communication control unit (100) scans frequency channels and searches for an access point, the second communication control unit (200) maintains connection with a terminal device. When a search processing unit (104) detects the access point, the second communication control unit (200) sets a frequency channel to be used between the terminal device and the second communication control unit to a frequency channel used at the detected access point.