The Farman F.40 was a French pusher biplane reconnaissance aircraft.
Forty French Air Force escadrilles (squadrons) were equipped with F.40s. They operated for just over a year, but were replaced in early 1917.
The F.40 was also operated by the No. 5 Wing of the Royal Naval Air Service, Belgian forces in France, and also by the Russians
Italian aircraft maker Savoia-Marchetti built F.40s for use by the police force until 1922.