A method for manufacturing a die to be used for formation of honeycomb structure, the die having a die base having two faces, honeycomb-shaped slits 5 being formed in one face and back holes communicating with the slits 5 being formed in the other face in order to introduce a forming material thereinto, at least the slit portions of the die being made of a super had alloy, wherein slits 5 are formed by grinding or electric discharge machining, then a discharging electrode 40 having a square-shaped section is disposed near each crossing portion of slits 5, and electric discharge machining is conducted from the upper side of slit 5 toward the depth direction of slit.