Pilmatueia ("Of Pilmatué") is a genus of dicraeosaurid sauropod from the Early Cretaceous Mulichinco Formation of Argentina. Its name comes from the PilmatuIté locality of the formation, where the animal's remains were discovered. It is the oldest known Cretaceous dicraeosaurid and is the fist dicraeosaurid known from its stage of the Cretaceous (Valanginian).