There is provided a touch or proximity sensor including a plurality of first touch electrodes extending in a first direction and being arranged in a second direction intersecting the first direction, and a plurality of second touch electrodes extending in the second direction, being arranged in the first direction, and insulated from the plurality of first touch electrodes, in which at least one of the plurality of first touch electrodes and at least one of the plurality of second touch electrodes respectively have concave surface on a detection surface side.