A switch device is provided that includes a first switch portion in which an upper electrode and lower electrodes face each other at a predetermined gap and a second switch portion having metal domes which are disposed at a lower side facing the first switch portion and expand to a predetermined height. A first spacer having a predetermined thickness A is disposed in the first switch portion to form a gap between the upper electrode and the lower electrodes, a second spacer having a thickness B equal to or greater than the expanded height of the metal domes is disposed in the second switch portion, and the thickness of the second spacer is greater than that of the first spacer.