Abstract: A robot hand gripping device intended for equipping the end of the wrist or arm of an industrial robot or robotized appliance, comprising grasping members or fingers and hydromechanical controls for spreading the grasping members apart from one another and/or bringing them closer to one another. It is formed by assembling together two identical parts with an intermediate piece between the parts, connectors being provided in the intermediate piece for connecting the two identical parts to at least one drive-energy source, such as compressed air, oil or the like.