Slicing device, and method for slicing workpiece

This slicing device comprises a cutter device (12), a workpiece retaining part, a relative movement device, and a slicing position manipulating unit. The cutter device (12) has a slicing blade that is driven in a direction along a blade surface. The workpiece retaining part retains a workpiece. The relative movement device moves the workpiece retaining part and the cutter device (12) relative to one another in a slicing direction in which a workpiece, i.e., m meat, is sliced. The slicing position manipulating unit causes the slicing blade of the cutter device (12) to approach or separate from the workpiece moving relative thereto in the slicing direction, in a direction intersecting the slicing direction. At a position on the slicing blade abutting the workpiece, a blade surface section for cutting the workpiece along the driving direction of the slicing blade and a pressing section for pressing the outer surface of the workpiece are arranged alternatingly.