Disclosed is a touch sensor, including a separation layer, an electrode pattern part formed on the separation layer and including at least one electrode pattern and an insulating layer, and a passivation layer formed of an inorganic material on the electrode pattern part, wherein the passivation layer has a thickness selected from among a thickness ranging from 50 nm to 120 nm, a thickness ranging from 220 nm to 290 nm, and a thickness ranging from 360 nm to 420 nm.