Operation indicator device and panel unit

The present invention relates to an operation indicator device, more particularly to an operation indicator device in which a plurality of panel units are placed, and the panel unit used in the operation indicator device. Panel units (to ) continuing an operation indicating panel () each have a rectangular surface S with length and width each being substantially an integral multiple of a predetermined reference size (L). The panel units (and ) are placed so that their surfaces S may be adjacent to one another. A whole surface (AS) consisting of the surfaces S of all the panel units (to ) is formed in a rectangular shape with length and width each being substantially an integral multiple of the predetermined reference size (L). The arrangement and the like of the panel units (to ) can be easily changed.