Joseph-Bernard Rosier (18 October 1804 – 12 October 1880) was a 19th-century French playwright and librettist.

He first worked as a solicitor's clerk before becoming a professor of rhetoric[1] and embarking on a literary career in 1830.

His plays were presented on the most significant Parisian stages of the 19th century, including those of the Théâtre du Vaudeville, the Théâtre des Variétés, the Théâtre de la Porte Saint-Martin, and the Théâtre-Français.