A touch sensor according to an embodiment of the present invention includes a substrate layer, first sensing electrode rows and second sensing electrode rows alternately arranged on the substrate layer, first traces extending from left ends of the first sensing electrode rows, the first traces including periodically arranged bent portions, second traces extending from right ends of the second sensing electrode rows, the second traces including periodically arranged bent portions, a first floating trace adjacent to an outermost first trace of the first traces, and a second floating trace adjacent to an outermost second trace of the second traces.