A grasping method is by a grasping apparatus that is provided with a grasping portion that has a plurality of pawl portions, and a plurality of contact portions that are provided on portions of the plurality of pawl portions, which contact a workpiece, and that are able to be hardened. The grasping method includes conforming the contact portions to an outer shape of a master workpiece that has an outer shape that is able to deform the contact portions to a shape for positioning the workpiece; hardening the contact portions in a state conformed to the outer shape of the master workpiece; positioning the workpiece; and grasping the positioned workpiece with the grasping portion by hardening the contact portions while keeping the contact portions in the shape conformed to the outer shape of the workpiece.