To provide a plate, used for a door of furniture or the like, and having good appearance and excellent function obtained by joining a plurality of plate pieces.

An upper plate piece 10 is fitted in a rectangular space formed by a base plate 2 of a joining member 1, a leg 4 and a decorated plate 5, and the upper plate piece 10 is screwed on the base plate 2 through a threaded hole 3. A lower plate piece 20 is also fitted into a rectangular space formed by a base plate 2', a leg 4' and a decorative plate 5', and screwed on the base plate 2' through a threaded hole 3. At this time, the joint surface of the upper plate piece 10 and the joining member 1 is concealed with the decorative plate 5, and the joint surface of the lower plate piece 20 and the joining member 1 is concealed with the decorative plate 5'.