Abstract: The invention relates to an appliance for simulating the chewing action of a mammal, said appliance comprising two elements (21, 22) simulating a mobile lower maxilla and a fixed upper maxilla. The two elements are formed by two parallel disks (21, 22) aligned on a common axis (A-A?), a face of each disk, facing the other disk (21, 22), being provided with at least one raised part (31, 33) projecting from said face. The appliance comprises means (16, 17,18,19) for driving at least one (21) of said disks in relation to the other disk (22), rotationally about the common axis (A-A?) and in translation (12,13,14) parallel to said axis.