Georges Charles Guillain (French pronunciation: [ɡilɛ̃]) (March 3, 1876 - June 29, 1961) was a French neurologist born in Rouen.
He studied medicine in Rouen and Paris, where he learned clinical education at several hospitals. He developed an interest in neurology, and his first important scientific work involved lesions of the plexus brachialis. He earned his medical doctorate at Paris in 1898.
He later became chef de clinique for nervous disease and in 1910 attained the title of agrégé. After World War I he worked at Charité Hospital in Paris, and in 1923 became a professor of neurology at the Salpêtrière.
Guillain was a prolific writer, in 1920 with his friend Jean Barré (1880-1967), he published a major work titled Traveux neurologiques de guerre concerning their clinical experiences during the war. He was a member of French, American, and Japanese academies of science, and in 1949 was appointed commander of the Légion d'honneur. He died in Paris.