A touch input device capable of detecting pressure of a touch on a touch surface may be provided. The touch input device includes: a display module including a display panel; a substrate which is disposed below the display module and is a reference potential layer; and one or more pressure electrodes which are formed on the display panel. The display panel includes electrodes used to drive the display panel. A drive signal Tx which is applied to the pressure electrode is simultaneously applied to one or more of the electrodes used to drive the display panel. A capacitance which is detected at the pressure electrode is changed by a distance change between the pressure electrode and the substrate due to the pressure applied to the touch surface. A magnitude of the pressure applied to the touch surface is calculated based on the detected capacitance calculated from the capacitance which is detected at the pressure electrode.