A laser processing device comprising: a light source configured to output laser light; a spatial light modulator configured to display a modulation pattern for modulating the laser light output from the light source; a condenser lens configured to condense the laser light modulated by the spatial light modulator, on an object; and a control unit configured to control the spatial light modulator to adjust the modulation pattern in accordance with a traveling direction of a condensing point of the laser light with respect to the object.