The Aérospatiale Alouette II is a French light helicopter originally manufactured by Sud Aviation and later Aérospatiale. It was the first production helicopter powered by a gas turbine engine instead of the heavier conventional piston powerplant.

Sud Aviation was a French state-owned aircraft manufacturer, originating from the merger of Sud-Est and Sud-Ouest on 1 March 1957. Both companies had been formed from smaller privately owned corporations that had been nationalized into six regional design and manufacturing pools just prior to the Second World War.