Émile Pierre Ratez (also René Emile Ratez; 1851–1934) was a French composer, administrator and violist. Ratez was born in Besançon on 5 November 1851, and became a pupil of (Pierre?) De Mol at the music school there and later, a pupil of Bazin and of Jules Massenet at the Conservatoire de Paris in the 1870s. In 1891 he became the director of the Lille branch of the Paris Conservatory. He died in Lille on 19 May 1934. His six Characteristic Pieces have been republished by Billaudot.