To enable fabrication of a precise stamped product having an extremely low surface roughness. Ripples 24 having depths ranging from 10 to 100 nm are formed with periodicities ranging from 100 to 1000 nm on a stamping tool surface that comes into contact with a workpiece material. The ripples 24 have a stripe shape extending in a direction substantially perpendicular to the direction of sliding between the stamping tool (die 21) and the workpiece material (the direction of the arrow a). The ripples 24 serve as micro pools. For example, a product that is required to have a surface roughness of the order of several tens of nm or lower can be satisfactorily stamped.