An optical scanner is disclosed. The optical scanner of the present invention comprises: a housing; a rotating body which rotates inside the housing; a first reflective surface which forms the outer surface of the rotating body; a second reflective surface which forms the outer surface of the rotating body; a shade which is located between the first reflective surface and the second reflective surface and is extended from the rotating body toward the inner surface of the housing; a light emitting part which supplies light to the first reflective surface; and a light receiving part which detects light reflected from the second reflective surface.