There is provided a touch sensor including: a base substrate; a first electrode pattern formed on the base substrate and including first electrode lines repeatedly arranged in parallel with each other; and a second electrode pattern formed on a surface spaced apart from a surface on which the first electrode pattern is formed and including second electrode lines intersecting with the first electrode lines and repeatedly arranged in parallel with each other, wherein an extension line connecting intersection points between the first and second electrode lines to each other is formed as an oblique line with respect to a horizontal direction.