The Duo de l’ouvreuse de l’Opéra Comique et l’employé du Bon Marché (Duet of the usherette from the Opéra-Comique and the employee of the Bon-Marché department store) is a comic vocal work by Emmanuel Chabrier for soprano and tenor, with piano accompaniment.
The revue also had contributions from Jules Massenet, Léo Delibes, Ernest Guiraud, Victorin de Joncières, Théodore Dubois, Vincent d'Indy, Charles Lenepveu, André Messager, Gabriel Pierné and Paul Vidal.
The piece was first published in Le Figaro musical in April 1893, along with the Couplets du capitaine des pompiers (in honour of Colonel Constant, the head of the fire brigade the night of the fire at the Opéra-Comique on 25 May 1887) by André Wormser.
The usherette, financially secure thanks to government compensation to victims of the fire at the Salle Favart, is able to marry the shop assistant who sings praises to Aristide Boucicaut, founder of the Parisian department store, for his pension, while the usherette lauds Léon Carvalho, director of the Opéra Comique from 1876–87 and 1891-97.
Chabrier wrote to Mme Fuchs on 31 May 1888 to ask her to lend the manuscript to his publishers, Enoch Freress et Costallat, so that they could make a copy of the score.