To provide a laser processing device configured so that workloads in arranging a processing block are reduced and eventually usability of the device can be improved.SOLUTION: A laser processing device L comprises: a coaxial camera 6 that has an imaging optical axis A1 branching from a laser optical path P and generates a coaxial image Pw1; a display part 801 that has a first display region 801a in which the coaxial image Pw1 is displayed and displays a printing block B in the first display region 801a so that the block is superimposed with the coaxial image Pw1; a printing block moving part 108d that moves a position of the printing block B with respect to the coaxial image Pw1 in the first display region 801a; and a control part 101 that controls a laser scanning part 4 so that the coaxial image Pw1 is renewed in response to movements of the printing block B by the printing block moving part 108d.SELECTED DRAWING: Figure 14