A touch input device capable of detecting a touch pressure, the touch input device comprising: a display panel having a pressure electrode (450, 460; 455), a reference potential layer which is formed separately from the pressure electrode (450, 460; 455), a cover layer which is disposed on the display panel , and a substrate which is disposed under the display panel , wherein the pressure electrode (450, 460; 455) is formed on a back side of the display panel for detecting the pressure, wherein the substrate comprises the reference potential layer , wherein the touch input device detects the touch pressure on the basis of a capacitance change amount according to a change of a distance between the pressure electrode (450, 460; 455) and the reference potential layer , wherein, when a pressure is applied to the touch input device , the cover layer and the display panel are bent, so that the distance between the pressure electrode (450, 460; 455) and the reference potential layer is changed, wherein when no pressure is applied to the touch input device , a predetermined distance between the pressure electrode (450, 460; 455) and the reference potential layer is maintained by a support member disposed only on a circumference of the substrate a display panel having a pressure electrode (450, 460; 455), a reference potential layer which is formed separately from the pressure electrode (450, 460; 455), a cover layer which is disposed on the display panel , and a substrate which is disposed under the display panel , wherein the pressure electrode (450, 460; 455) is formed on a back side of the display panel for detecting the pressure, wherein the substrate comprises the reference potential layer , wherein the touch input device detects the touch pressure on the basis of a capacitance change amount according to a change of a distance between the pressure electrode (450, 460; 455) and the reference potential layer , wherein, when a pressure is applied to the touch input device , the cover layer and the display panel are bent, so that the distance between the pressure electrode (450, 460; 455) and the reference potential layer is changed, wherein when no pressure is applied to the touch input device , a predetermined distance between the pressure electrode (450, 460; 455) and the reference potential layer is maintained by a support member disposed only on a circumference of the substrate wherein the pressure electrode (450, 460; 455) is formed on a back side of the display panel for detecting the pressure, wherein the substrate comprises the reference potential layer , wherein the touch input device detects the touch pressure on the basis of a capacitance change amount according to a change of a distance between the pressure electrode (450, 460; 455) and the reference potential layer , wherein, when a pressure is applied to the touch input device , the cover layer and the display panel are bent, so that the distance between the pressure electrode (450, 460; 455) and the reference potential layer is changed, wherein when no pressure is applied to the touch input device , a predetermined distance between the pressure electrode (450, 460; 455) and the reference potential layer is maintained by a support member disposed only on a circumference of the substrate <EOS>