Joseph-Henri Altès (18 January 1826 – 24 July 1895)[1] was a 19th-century French flautist, composer and pedagogue.

Like his teacher, Jean-Louis Tulou, he played a flute with four keys and only later changed to a Theobald Boehm model.

Altès is the author of a method of flute, Célèbre méthode complète de flûte[2] (1880) and left about 40 compositions, including six solos for the entrance competition at the Paris Conservatory and transcriptions or fantasies on opera themes.

Altès was a friend of the painter Edgar Degas, who depicted him in 1870 on the painting titled The Orchestra at the Opera (L'Orchestre de l'Opéra [fr]) housed at the Musée d'Orsay.

He was buried on the cimetière de Montmartre (33rd division) with his wife, the opera singer Émilie-Francisque Ribault.