a confocal scanner which synchronously rotates a first disk , having a plurality of focusing means , and a second disk , having a plurality of apertures of the same pattern as the focusing means , and scans a sample by focusing light beams passing through the focusing means and apertures ; wherein the plurality of focusing means are arranged so that each border line between focusing means passes each bisected point of line segments connecting any two center points of adjacent focusing means thereby improving efficiency of light utilization .