The present disclosure relates to a touch sensor including: a first electrode layer including a first main electrode and a first auxiliary electrode formed to be spaced apart from the first main electrode; a second electrode layer including a second main electrode and a second auxiliary electrode formed to be spaced apart from the second main electrode; and an insulating layer positioned between the first electrode layer and the second electrode layer and provided with a contact hole, in which one or more of the first electrode layer and the second electrode layer have a line width of an electrode pattern region corresponding to the contact hole larger than the contact hole, and an image display device including the same.