Alexandre François Malbranche (6 April 1818, Bernay, Eure – 16 May 1888, Rouen) was a French pharmacist, botanist and mycologist.
He is known for his botanical and mycological studies associated with Normandy,
He received his education in Rouen, where he subsequently spent his career as a pharmacist.
He served as president of the Société des amis des sciences de Rouen, and for several years was a member of the Société botanique de France (1879–1888).He was the author of treatises on lichens, fungi, teratology in plants, Darwinism and on the botanical genus Rubus.
As a taxonomist, he co-circumscribed a number of Rubus species.
The mycological genus Malbranchea was named in his honor by Pier Andrea Saccardo (1882).