Provided is a lens apparatus for driving an optical member based on a demand signal from a demand device, including: a connector for receiving the demand signal from the demand device by wire; a wireless receiver for wirelessly receiving the demand signal from the demand device; and an identifying section for identifying whether or not the demand device and the lens apparatus have a wired connection with each other, in which the demand signal from the demand device is selected based on a result obtained by the identifying section, and the optical member is driven based on the selected demand signal.