Abstract: A touch sensor having a visible area and a peripheral area includes a substrate, a metal nanowire layer, a transitional insulating portion, and a silver layer. The metal nanowire layer is disposed on the substrate and defines a plurality of electrode portions corresponding to the visible area and a plurality of wiring portions corresponding to the peripheral area, in which the adjacent wiring portions are spaced apart by a spaced region. The transitional insulating portion is disposed in the spaced region and adjacent and connected to a sidewall of each of the wiring portions, and a gap is between two of the transitional insulating portions that are respectively connected to the adjacent wiring portions. The silver layer is disposed on an upper surface of the wiring portions, and the silver layer and the wiring portions together constitute a plurality of peripheral traces of the touch sensor.