To safely cut and remove edge parts, crowded out of the side of a decorative laminate material, of a decorative sheet without requiring labor and skill, by moving a cutter along each of the sides of the decorative laminate material with the help of an X-Y axis movement device and a cutter gyration device.

This decorative sheet edging machine comprises a table 2 for supporting a reversed square decorative laminate material 40, an X-Y axis positioning device 5 for positioning the sides of the decorative laminate material 40 placed on the table 2 to the right/left and in the forward/backward direction, a head 10 having a cutter 19 protruding horizontally at the lower end part, a Z axis movement device 38 for moving the head 10 vertically with the decorative laminate material 40, an X-Y axis movement device 25 for moving the head 10 to the right/left and in the forward/backward direction along the peripheral edge part of the decorative laminate material 40 placed on the table 2 and a cutter gyration device 12 for gyrating the cutter 19 of the head 10 centered around the vertical axis center at each of the corner parts of the decorative laminate material 40.