Guy Mouminoux (known by the pseudonym Guy Sajer), was a French writer and cartoonist. He is best known as the author of the Second World War novel Le Soldat Oublié (1965, translated as The Forgotten Soldier), which is based on his experience serving in the Wehrmacht on the Eastern Front from 1942 to 1945, in the elite Großdeutschland Division.

After the war, Mouminoux had a long career as a cartoonist, writing and illustrating under his real name, and also under the pen names Dimitri and Dimitri Lahache.