A touch sensor having a visible area and a peripheral area on at least one side of the visible area includes a substrate, a metal nanowire layer, and a metal layer. The metal nanowire layer is disposed on the substrate and has a first portion corresponding to the visible area and a second portion corresponding to the peripheral area. The metal layer is disposed on the second portion of the metal nanowire layer and has at least one extending portion extending into the visible area, in which the extending portion overlaps the first portion of the metal nanowire layer.