Brigadier Gerard is the hero of a series of 17 historical short stories, a play, and a major character in a novel by the British writer Arthur Conan Doyle.

Gerard's most notable attribute is his vanity – he is utterly convinced that he is the bravest soldier, greatest swordsman, most accomplished horseman and most gallant lover in all France.

In "How the Brigadier Slew the Brothers of Ajaccio", he states that he is 'in my sixtieth year', indicating that he is narrating the story in the early 1840s.

We learn in the introduction to "How the Brigadier Slew the Fox" that Gerard died of old age, but no further details are provided.

Conan Doyle modelled the character of Gerard on a number of real-life sources from the Napoleonic era, writing in his author's preface that "readers of Marbot, de Gonneville, Coignet, de Fenezac, Bourgogne (fr), and the other French soldiers who have recorded their reminiscences of the Napoleonic campaigns will recognise the fountain from which I have drawn the adventures of Etienne Gerard.

[3] The fictional Gerard is not to be confused with the real Napoleonic officer Étienne Maurice Gérard (1777–1852), who rose to become a Marshal and later Prime Minister of France.

In May 2008, Penguin Classics published the complete short stories as The Exploits and Adventures of Brigadier Gerard as part of their Read Red series.

In 1915 a silent film Brigadier Gerard was made, directed by Bert Haldane with Lewis Waller in the title role.