The Antoinette military monoplane, also known as the Antoinette Monobloc or the Antoinette-Latham was an early 3-seat monoplane built in France in 1911 by the Antoinette company in the hope of attracting orders from the French military. It featured a futuristic and aerodynamic design with innovative elements that were ahead of its time, including unbraced cantilever wings, an enclosed fuselage and wheel fairings, and an engine with steam cooling and direct fuel injection. However, due to an under-powered engine, it was barely able to fly and failed to attract orders.

Antoinette was a French manufacturer of light petrol engines. Antoinette also became a pioneer-era builder of aeroplanes before World War I, most notably the record-breaking monoplanes flown by Hubert Latham and René Labouchère. Based in Puteaux, the Antoinette concern was in operation between 1903 and 1912. The company operated a flying school at Chalons for which it built one of the earliest flight simulators.