To provide a grip jaw which can prevent a grip surface of a jaw chuck from thermal deformation at the time of brazing with hard alloy.

This invention is related to a grip jaw 10 for a jaw chuck which includes a metal body 12 waxing a hard alloy. In order to prevent a grip jaw 10 from transforming because of hard waxing treatment, this invention provides a grip jaw whose surface 18 has a hard alloy particle 22 instead of using one hard alloy plates.