A touch input device may be provided that includes: a cover; a display module disposed under the cover; and a pressure sensing unit disposed under the display module. The pressure sensing unit includes a first elastic foam, a pressure sensor disposed on the first elastic foam, and a first adhesive layer disposed between the first elastic foam and the pressure sensor. A change amount of a stress of the first elastic foam required for the first elastic foam to be compressed to half of the thickness thereof from its original state is less than the change amount of the stress of the first elastic foam required for the first elastic foam to be compressed from half of the thickness thereof to the thickness to which the first elastic foam is able to be maximally compressed.