An input device comprising: a pressure-sensitive sensor including a first sensing unit (S1) and a second sensing unit (S2); 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 (S2), 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 (S1), and a pusher of the pressing unit is disposed above the second sensing unit (S2) the first sensing unit (S1) is disposed in a first region (R1) of the sensing surface indicating a pressing region of light load pressed by the bottom during a touch operation, the second sensing unit (S2) is disposed in a second region (R2) 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 (S1) and the second sensing unit (S2); 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 (S1) and a second sensing unit (S2); 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 (S2), 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 (S1), and a pusher of the pressing unit is disposed above the second sensing unit (S2) the pressing unit has a protruding portion protruding toward the second sensing unit (S2), 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 (S1), and a pusher of the pressing unit is disposed above the second sensing unit (S2) the first sensing unit (S1) is disposed in a first region (R1) of the sensing surface indicating a pressing region of light load pressed by the bottom during a touch operation, the second sensing unit (S2) is disposed in a second region (R2) 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 (S1) and the second sensing unit (S2); 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 (S1) and the second sensing unit (S2); 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 . <EOS>