An input device is manufactured from a roll of a single-layer flexible transparent base sheet having a first surface and a second surface by forming a transparent electrode pattern and a wiring layer on the first surface. The transparent electrode pattern is disposed in a transparent input region, and the wiring layer extends from an end of the transparent electrode pattern into a decorative region surrounding the transparent input region. A decorative layer pattern is formed on the second surface in the decorative region, while conveying the transparent base sheet through a roll-to-roll processing. The transparent base sheet having the transparent electrode pattern and the decorative layer pattern is divided into individual units. A transparent panel having an operation surface is bonded to the second surface of each of the individual units with an optically clear adhesive layer interposed therebetween.