A laser marker for radiating laser light to an object including a metal surface, to form a mark, comprising: a laser light source configured to emit the laser light; an illumination optical system configured to shape the laser light into a line-shaped parallel beam; a spatial light modulator including a plurality of modulation components arranged along a long-axis direction, the spatial light modulator being configured to modulate the parallel beam into a line-shaped modulated beam using the plurality of modulation components; a projection optical system configured to guide the modulated beam to the object; a scanning unit configured to scan the surface of the object with the modulated beam; the laser marker being characterised by: a control unit for controlling the laser light source, the spatial light modulator, and the scanning unit on the basis of image data indicating an image to be drawn on the object, wherein each of the plurality of modulation components is capable of exercising multilevel control of a light amount, wherein, when the scanning unit scans a second area adjacent to a first area that is to be scanned earlier, the scanning unit performs scanning while superposing an edge portion of the modulated beam on an edge portion of the first area, and wherein the control unit is configured to control the amount of reflected light of the modulated beam guided to an irradiation surface in accordance with image data for each of the modulation components of the spatial light modulator, and to further control the spatial light modulator such that a total energy amount of the laser light radiated to the edge portion of the first area in scanning of the first area and scanning of the second area is equal to a total energy amount of light radiated to an area adjacent to the edge portion of the first area. a laser light source configured to emit the laser light; an illumination optical system configured to shape the laser light into a line-shaped parallel beam; a spatial light modulator including a plurality of modulation components arranged along a long-axis direction, the spatial light modulator being configured to modulate the parallel beam into a line-shaped modulated beam using the plurality of modulation components; a projection optical system configured to guide the modulated beam to the object; a scanning unit configured to scan the surface of the object with the modulated beam; the laser marker being characterised by: a control unit for controlling the laser light source, the spatial light modulator, and the scanning unit on the basis of image data indicating an image to be drawn on the object, wherein each of the plurality of modulation components is capable of exercising multilevel control of a light amount, wherein, when the scanning unit scans a second area adjacent to a first area that is to be scanned earlier, the scanning unit performs scanning while superposing an edge portion of the modulated beam on an edge portion of the first area, and wherein the control unit is configured to control the amount of reflected light of the modulated beam guided to an irradiation surface in accordance with image data for each of the modulation components of the spatial light modulator, and to further control the spatial light modulator such that a total energy amount of the laser light radiated to the edge portion of the first area in scanning of the first area and scanning of the second area is equal to a total energy amount of light radiated to an area adjacent to the edge portion of the first area. a control unit for controlling the laser light source, the spatial light modulator, and the scanning unit on the basis of image data indicating an image to be drawn on the object, wherein each of the plurality of modulation components is capable of exercising multilevel control of a light amount, wherein, when the scanning unit scans a second area adjacent to a first area that is to be scanned earlier, the scanning unit performs scanning while superposing an edge portion of the modulated beam on an edge portion of the first area, and wherein the control unit is configured to control the amount of reflected light of the modulated beam guided to an irradiation surface in accordance with image data for each of the modulation components of the spatial light modulator, and to further control the spatial light modulator such that a total energy amount of the laser light radiated to the edge portion of the first area in scanning of the first area and scanning of the second area is equal to a total energy amount of light radiated to an area adjacent to the edge portion of the first area.