A wireless transmission/reception system is provided which can use a limited frequency band most effectively and operates flexibly. A receiver (wireless receiver) has a transmission processing unit for transmitting a control signal, which defines a wireless frequency band and a transmission frequency for each of wireless transmission signals, to a plurality of cameras (wireless transmitter) #C1 to #C5, and the cameras have reception processing units for receiving the controls signal. Each of the cameras can change the frequency band and a center frequency of the wireless transmission signal according to the input control signal. As a result, output channels (Ch1 to Ch5) of the receiver can be changed to a broadband channel or a narrowband channel arbitrarily.