A dial plate unit includes a dial plate provided with an outside dial plate element having an opening, an inside dial plate element spaced at a predetermined distance from the outside dial plate element, and a frame member provided in the opening of the outside dial plate element and closing a gap between the periphery of the opening and a part of the inside dial plate element corresponding to the periphery of the opening. The unit further includes one indicating member disposed in a side of the outside dial plate element opposite to the inside dial plate element and being movable along the outside dial plate element, and one auxiliary indicating member disposed in the opening and being movable between the outside and inside dial plate elements. A device using the dial plate unit includes a indicating member operating module which operates the indicating member and auxiliary indicating member.