A cutting apparatus includes a chuck table that holds a workpiece, a processing unit that forms a processed groove in the workpiece, an imaging unit that images the workpiece, a display unit that displays a captured image of a processed groove imaged by the imaging unit, and a control unit that executes display control of a display screen of the display unit. The control unit causes a mark that indicates the latest processed groove based on the Y-coordinate of the latest processed groove to be displayed on the display unit while being superimposed on a captured image.

A cutting apparatus includes a chuck table that holds a workpiece, a processing unit that forms a processed groove in the workpiece, an imaging unit that images the workpiece, a display unit that displays a captured image of a processed groove imaged by the imaging unit, and a control unit that executes display control of a display screen of the display unit. The control unit causes a mark that indicates the latest processed groove based on the Y-coordinate of the latest processed groove to be displayed on the display unit while being superimposed on a captured image.

A tool path generating device (20) which generates a tool path (L1) for machining a hairline-shaped long narrow groove (Wa) of on a workpiece surface (W0), includes a shape data acquisition part which acquires shape data of a workpiece, a parameter setting part (23) which sets a shape parameter of a hairline corresponding to the long narrow groove (Wa), and a path generating part (24) which generates a tool path (L1) for a hairline machining, based on the shape data acquired by the data acquisition part and the shape parameter set by the parameter setting part (23).