Eugène Hyacinthe Laffillard (17 June 1779 – 5 January 1846) was a 19th-century French playwright and chansonnier. A president of the in 1839, he participated to numerous literary publications such as the Courrier des Théâtres, La Nouveauté, the Observateur, the Voleur and La France littéraire. He wrote many vaudevilles under his name or the pen name Eugène Décour. His plays were presented on the most important Parisian stages of the 19th century: Théâtre du Vaudeville, Théâtre de la Gaîté, Théâtre du Panthéon, Théâtre de l'Ambigu-Comique, Théâtre des Variétés etc.