An input device comprising: a pressure-sensitive sensor including a first sensing unit and a second sensing unit; and a pressing unit that is disposed on a sensing surface of the pressure-sensitive sensor and undergoes buckling deformation, wherein: the pressing unit has a protruding portion protruding toward the second sensing unit, the protruding portion presses the pressure-sensitive sensor during buckling deformation of the pressing unit, a bottom of the pressing unit is disposed above the first sensing unit, and a pusher of the pressing unit is disposed above the second sensing unit the first sensing unit is disposed in a first region of the sensing surface indicating a pressing region of light load pressed by the bottom during a touch operation, the second sensing unit is disposed in a second region of the sensing surface indicating a pressing region of heavy load pressed by the protruding portion during a push operation, the pressure-sensitive sensor is an electrostatic capacitance type pressure-sensitive sensor characterized in that the pressure-sensitive sensor includes: a first conductor layer; a second conductor layer deformed by pressing of the pressing unit; a sensor layer disposed between the first conductor layer and the second conductor layer and including the first sensing unit and the second sensing unit; a first structure disposed between the first conductor layer and the sensor layer; and a second structure disposed between the second conductor layer and the sensor layer. a pressure-sensitive sensor including a first sensing unit and a second sensing unit; and a pressing unit that is disposed on a sensing surface of the pressure-sensitive sensor and undergoes buckling deformation, wherein: the pressing unit has a protruding portion protruding toward the second sensing unit, the protruding portion presses the pressure-sensitive sensor during buckling deformation of the pressing unit, a bottom of the pressing unit is disposed above the first sensing unit, and a pusher of the pressing unit is disposed above the second sensing unit the pressing unit has a protruding portion protruding toward the second sensing unit, the protruding portion presses the pressure-sensitive sensor during buckling deformation of the pressing unit, a bottom of the pressing unit is disposed above the first sensing unit, and a pusher of the pressing unit is disposed above the second sensing unit the first sensing unit is disposed in a first region of the sensing surface indicating a pressing region of light load pressed by the bottom during a touch operation, the second sensing unit is disposed in a second region of the sensing surface indicating a pressing region of heavy load pressed by the protruding portion during a push operation, the pressure-sensitive sensor is an electrostatic capacitance type pressure-sensitive sensor characterized in that the pressure-sensitive sensor includes: a first conductor layer; a second conductor layer deformed by pressing of the pressing unit; a sensor layer disposed between the first conductor layer and the second conductor layer and including the first sensing unit and the second sensing unit; a first structure disposed between the first conductor layer and the sensor layer; and a second structure disposed between the second conductor layer and the sensor layer. a first conductor layer; a second conductor layer deformed by pressing of the pressing unit; a sensor layer disposed between the first conductor layer and the second conductor layer and including the first sensing unit and the second sensing unit; a first structure disposed between the first conductor layer and the sensor layer; and a second structure disposed between the second conductor layer and the sensor layer.