A touch sensor includes first through third sensing areas, first through third sensing patterns respectively disposed in the first through third sensing areas, a sensing line disposed in a non-sensing area and electrically connected to the first sensing pattern, and a connection line disposed in the non-sensing area and disposed between the sensing line and the first sensing pattern. The connection line electrically connects the second and third sensing patterns. The touch sensor further includes a connection portion electrically connecting the sensing line and the first sensing pattern, a dummy line disposed between the sensing line and the connection line, a ground line disposed in the non-sensing area that transmits a ground voltage to the first to third sensing areas, and a bridge line electrically connecting the ground line and the dummy line.