Lo Boièr ("The Oxherd", also known as Le Bouvier in French) is an Occitan traditional song. It was popular in Languedoc during the Late Middle Ages, being particularly associated to the religious movement of Catharism. It might have developed during the Albigensian Crusade, when Cathar beliefs were declared forbidden. Along with Se Canta, it is possibly the most known old Occitan song. It was studied by Gérard de Sède and performed by artists like , Jean-Bernard Plantevin, André Ricros and Gacha Empega. It was also utilized by Radio Toulouse during World War I as a resistance song.