Abstract: The invention concerns an artificial heart capable of being wholly implanted including in a single-piece module (2) two independent ventricular chambers (22G, 22D) each provided with two orifices (11G, 11D, 12G, 12D) equipped with a valve for respectively releasing and pumping blood. The volume of each chamber (22G, 22D) is variable by means of a mobile membrane (17, 18) constituting a wall of the chamber (22G, 22D) and hydraulically actuated by a fluid driven by an actuator comprising a motor and a volumetric pump. The ventricular chambers (22G, 22D) are arranged so as to form an upside-down V, between whose branches are arranged the actuators and the space (37) for the actuating fluid. The chambers (22G, 22D) include on the outside convex walls (7G, 7D) the releasing and pumping orifices (11G, 11D, 12G, 12D).