A touch switch includes a glass substrate; a lattice pattern formed on the glass substrate by a plurality of first line wirings and a plurality of second line wirings; and a non-transparent insulating member formed on the first line wirings and the second line wirings. The plurality of first line wirings are arranged at a predetermined interval. The plurality of second line wirings are arranged at a predetermined interval to intersect the first line wirings. The sensor units and dummy sensor units are formed to be electrically isolated from each other and adjacent to each other by separators provided in the first and second line wirings of the lattice pattern. Marks are formed by the non-transparent insulating member and a transparent opening section, the marks being arranged in positions corresponding to the sensor units.