A scanner apparatus that scans an object with a line pattern of light and imports surface information of the object, comprising: an illumination unit (100, 110) arranged to project the line pattern of light onto the object; a pattern scanning mechanism arranged to change a projection position of the line pattern on the object with time; and an imaging unit (300, 301 to 303) arranged to capture an image of the object onto which the line pattern is projected from a predetermined direction, and imports surface information of the object, wherein the illumination unit (100, 110) includes a hologram recording medium (45, 46. 85) having recorded thereon an image of a scatter body having a shape corresponding to the line pattern, said medium being holographically recorded by optical interference with reference light beam irradiated along an optical path, a coherent light source arranged to generate a coherent light beam having a wavelength capable of reproducing the image of the scatter body as projected line pattern light, a light beam scanning device (60, 65) arranged to irradiate the light beam (L60, L65) onto the hologram recording medium (45, 46, 85) and arranged to scan the light beam so that an irradiation position of the light beam (L60, L65) on the hologram recording medium (45, 46, 85) changes with time, the scanner apparatus being characterized in that, at an irradiation position of the light beam (L60, L65) on the hologram recording medium (45, 46, 85), the irradiation direction optically conjugates and is comprised in the reference light beam path used at recording stage, and in that the line pattern of light projected by the illumination unit onto the object is the same and a relative position between the light pattern and the hologram recording medium (45, 46, 85) is the same regardless of the incidence irradiation position of the light beam on the hologram. an illumination unit (100, 110) arranged to project the line pattern of light onto the object; a pattern scanning mechanism arranged to change a projection position of the line pattern on the object with time; and an imaging unit (300, 301 to 303) arranged to capture an image of the object onto which the line pattern is projected from a predetermined direction, and imports surface information of the object, wherein the illumination unit (100, 110) includes a hologram recording medium (45, 46. 85) having recorded thereon an image of a scatter body having a shape corresponding to the line pattern, said medium being holographically recorded by optical interference with reference light beam irradiated along an optical path, a coherent light source arranged to generate a coherent light beam having a wavelength capable of reproducing the image of the scatter body as projected line pattern light, a light beam scanning device (60, 65) arranged to irradiate the light beam (L60, L65) onto the hologram recording medium (45, 46, 85) and arranged to scan the light beam so that an irradiation position of the light beam (L60, L65) on the hologram recording medium (45, 46, 85) changes with time, the scanner apparatus being characterized in that, at an irradiation position of the light beam (L60, L65) on the hologram recording medium (45, 46, 85), the irradiation direction optically conjugates and is comprised in the reference light beam path used at recording stage, and in that the line pattern of light projected by the illumination unit onto the object is the same and a relative position between the light pattern and the hologram recording medium (45, 46, 85) is the same regardless of the incidence irradiation position of the light beam on the hologram.