Pressure-sensitive touch sensor and pressure-sensitive touch sensor module

A pressure-sensitive touch sensor of a capacitance type, which is configured to detect pressing on an operation surface, the pressure-sensitive touch sensor comprising:

• a base material sheet;
• a first electrode;
• a second electrode;
• and
• an elastic layer,
• wherein the first electrode and the second electrode are each provided on any surface of the base material sheet,
• wherein the base material sheet is folded between the first electrode and the second electrode so that a surface of the first electrode and a surface of the second electrode face each other,
• wherein the base material sheet is folded at a fold line portion in which a slit is formed,
• wherein the elastic layer is provided between folded parts of the base material sheet, and
• wherein the pressing on the operation surface is detected based on a change in capacitance, which is caused when the elastic layer is compressed and deformed in a thickness direction by a pressing force to reduce a distance between the first electrode and the second electrode.