A driving mechanism for holding and shifting a part to be driven. The mechanism has at least three carrying elements for carrying the part elastically by exerting force upon the part in directions generally perpendicular to an axis of the part, at least one of the carrying elements being of a actuating type including a frictional actuator, the frictional actuator having a contact face for contacting the part under the pressure, the contact face oscillating at high frequency so as to make the part move in a direction almost rectangular to that of exerting the force upon the part.