Technologies for manufacturing a touch input device are disclosed. The method includes: forming, on a single carrier substrate, a flexible display for each of a plurality of display devices, cutting the flexible display into individual pieces, and separating the flexible display from the carrier substrate; a separate structure different from electrodes may be used to detect touch position forming step of forming, under a single substrate, a separate structure different from electrodes may be used to detect touch position for each of the plurality of display devices and cutting the substrate for the separate structure into individual pieces; and adhering each of the individual pieces of the separated flexible display to an individual piece of the substrate for the separate structure. The substrate for the separate structure may not be relatively easily bent as compared to the flexible display.