In order to solve the problem of the generation of the interspace between layers, the present invention provides an actuator comprising: a conductive polymer layer 31; an ambient temperature molten salt layer 35; and an opposite electrode layer 34; wherein the ambient temperature molten salt layer 35 is interposed between the conductive polymer layer 31 and the opposite electrode layer 34, the ambient temperature molten salt layer 35 comprises an adhesive layer 33 in the inside thereof; one surface of the adhesive layer 33 adheres to the conductive polymer layer 31; and the other surface of the adhesive layer 33 adheres to the opposite electrode layer 34.
