Input device

An input device comprising:

• an electrostatic sensor having a plurality of detection units arranged on a two-dimensional plane serving as a detection surface of an operation mode;
• and
• an operation body having a contact operation surface to be contact-operated by an operator, wherein
• the contact operation surface is an assembly of a plurality of contact points that the operator can touch with his finger, all the contact points are arranged with a distance from the detection surface in a direction perpendicular to the detection surface, and the contact operation surface is divided into at least two regions where the distance between the detection surface and the contact point becomes nonuniform,
• the detection unit includes one first electrode unit and one second electrode unit, the first and second electrode units being arranged in the direction perpendicular to the detection surface so as to have an inter-electrode distance therebetween to generate an electrostatic capacitance, and the first electrode unit and the second electrode unit varying the electrostatic capacitance in accordance with the contact operation by the operator on the contact operation surface or when the operator brings his finger close to the contact operation surface, and
• in the electrostatic sensor, an overlapping area of the first electrode unit and the second electrode unit when viewed in the direction perpendicular to the detection surface decreases as the detection unit is disposed in such a way that a distance with the contact point on the detection surface becomes narrower in the direction perpendicular to the detection surface.