Lavocatisaurus ("Lavocat's lizard") is a genus of rebbachisaurid sauropod from the Early Cretaceous Rayoso Formation of Argentina. It is known from three individuals, with one being an adult and two being juveniles. Due to the amount of individuals, Lavocatisaurus is known from almost all skeletal elements, meaning that it is almost complete. Its name originates from René Lavocat, the French researcher who described Rebbachisaurus, the first known member of the Rebbachisauridae family, of which Lavocatisaurus is a member.