Abstract: A new species of Eudinoceras (Pantodonta, Mammalia) is described ih this paper. The material, including left and right maxillas and two upper canines, were collected from the Eocene of Sishui Basin, Shandong province in 1992. The new species is typified by its large size. Upper premolars have prominent conical protocones which are very close to paracones, and of almost the same height as paracones; protolophs and V -shaped lophs of metacones of molars are fully lophoid, mesostyles are isolated and conical, protocones and metacones are relatively lingually located.