A workpiece bite device having a pinch member provided at a side for biting a workpiece in a pair of flat cutters which are disposed with those working blades facing each other for rolling the workpiece. The pinch member is fitted to a cutter body such that a starting portion of the pinch member is positioned at a side for charging the workpiece rather than a starting portion of the working blades of the cutter body, a terminal portion is positioned at a side of the working blade starting portion of the cutter body, and a top of the pinch member protrudes higher than a top of the working blade starting portion.