A line head module faces a photoconductor drum, and is disposed such that light-emitting elements are arranged parallel to a rotational axis of the photoconductor drum to carry out exposure on the photoconductor drum, and the photoconductor drum is rotatably disposed. The line head module includes a line head having the plurality of light-emitting elements, and a condensing lens that condenses light in a direction crossing the arrangement direction of the light-emitting elements between the photoconductor drum and the side of the line head from which light is output.