Robert François du Buysson (Born 6 May 1861 - Broût-Vernet (Allier) - Deceased 16 March 1946 - Saint-Rémy-la-Varenne (Maine-et-Loire)), was a French naturalist.
Having developed a taste for herbariums at a very young age and a keen sense of observation, Robert du Buysson began to study the mosses of his native region rapidly expanding his field of study to lichens and vascular cryptogams.
From 1888 to 1893 he published an inventory of vascular cryptogams of Europe in the Scientific Review of Bourbonnais and the Centre of France.
Robert du Buysson distinguished himself especially in the study of insects In April 1898 he obtained a position as a temporary entomology preparer at the Zoology Laboratory of the National Museum of Natural History in Paris.
Most of his work has been published in the Annales de la Société entomologique de France Robert du Buysson bequeathed his collection of hymenoptera to the entomology laboratory of the National Museum of Natural History.