马奇诺防线（法语：Ligne Maginot，英语：Maginot Line，德语：Maginot-Linie，(IPA: [maʒi'noː]）其名称来自当时法国的陆军部长安德烈·马奇诺（1877～1932）从1929年起开始建造，1940年才基本建成，造价50亿法郎（1930、1940年代货币）。防线主体有数百公里，主要部份在法国东部的蒂永维尔Thionville。

第二次世界大战之前位于法国东方所设的防御工事，由钢筋混凝土建造而成，十分坚固。由于造价昂贵，所以仅防御法德边境，至于荷兰则由英法联军作后援。防线内部拥有各式大炮、壕沟、堡垒、厨房、发电站、医院、工厂等等，信道四通八达，较大的工事中还有有轨电车信道。

The Maginot Line (French:Ligne Maginot, IPA: [liɲ maʒino]), named after the French Minister of War André Maginot, was a line of concrete fortifications, obstacles and weapon installations that France constructed on the French side of its borders with Switzerland, Germany and Luxembourg during the 1930s. The line did not extend through to the English Channel because the French military did not want to offend Belgium given its policy of neutrality. The line was a response to France's experience in World War I and was constructed during the run-up to World War II, shortly after the Locarno Conference that gave rise to a fanciful and optimistic "Locarno spirit".