To provide a capacitance type touch sensor capable of sufficiently securing sensitivity at the time of contact of a detected object even when an area of an operational surface has a constraint.

A sensor electrode 11 is covered with a surface panel 12, and when the detected object (finger F) is touched on the surface panel 12, electrostatic capacity Ch is formed between the finger F and the surface panel 12. A ground electrode 14 blocks external noises to the sensor electrode 11. The sensor electrode 11 and the ground electrode 14 are arranged on different zones in a flexible printed circuit 13, and are faced each other when the flexible printed circuit 13 is bent at a curved section 13a so as to straddle a spacer 15. The spacer 15 is inserted between the sensor electrode 11 and the ground electrode 14, and can secure a distance between the sensor electrode 11 and the ground electrode 14 so as to make electrostatic capacity Cn smaller than a standard value.