Each of first electrode sections forming a transmission electrode includes a first main line and a plurality of first auxiliary lines. Each of second electrode sections forming a reception electrode includes a second main line and a plurality of second auxiliary lines. With the transmission and reception electrodes and overlapping each other, the first main line and the second main line intersect with each other at one point, and a cell region is unclosed. The cell region is surrounded by two or more types of thin wires selected from a group consisting of the first main line, the first auxiliary lines, the second main line, and the second auxiliary lines.