PROBLEM TO BE SOLVED: To prevent a setting mistake while facilitating setting work by easily recognizing positional relationship of a marking head and a workpiece.SOLUTION: A laser beam machining apparatus includes: a machining data-generating part for generating a three-dimensional laser beam machining data by deforming a machining pattern into a three-dimensional form on the basis of profile information so as to make the machining pattern inputted by a machining pattern input means virtually coincide on an object surface to be machined, inputted by a machining surface profile input means; a three-dimensional display means for performing three-dimensional display of the machining pattern deformed into the three-dimensional form together with the objective surface to be machined; and an adjusting means for adjusting the pasting position on the objective surface to be machined of the machining pattern displayed on the three-dimensional displaying means. A laser beam control part is constituted so as to control a laser beam oscillating part, a beam expander, a first scanner and a second scanner on the basis of the three-dimensional laser beam machining data generated by the machining data-generating part and adjustment by the adjusting means.
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