Abstract: A new ornithopod dinosaur is named and described on the basis of two specimens from the Early Cretaceous Yixian Formation at Lujiatun Locality, Liaoning Province, China. Diagnostic features of this new ornithopod include six premaxillary teeth，a few foramina on the dorsal surface of the n，a large quadrate foramen on the lateral side of the quadratojugal, lack of external mandibular fenestra, predentary about 1.5 times as long as the premaxillary main body, anterior intercondylar groove of the femur absent, metatarsals not in the same plane, pedal phalanx 111—4 longer than other phalanges of pedal digit Ill. The discovery of a new ornithopod from the Yixian Formation increases the diversity of the Jehol fauna.