Ceramic honeycomb structure and honeycomb-molding die

A honeycomb-molding die comprising supply holes for supplying a moldable material, and lattice-shaped slits for molding said moldable material to a honeycomb shape, which are formed on the opposite surface side to a surface side on which said supply holes are formed, with communication with said supply holes;

• four corners of a die member at a slit intersection at which said lattice-shaped slits are crossing having circular recesses when viewed in the extrusion direction, said four circular recesses extending over the entire length of said lattice-shaped slits in the extrusion direction;
• the inscribed circles of said four circular recesses at all slit intersections having a constant radius;
• and
• when the distance between the center point of said inscribed circle and the center point of said slit intersection is defined as a die center point distance Sd, a die center point distance Sdc in a center portion of said honeycomb-molding die and a center point distance Sdo in an outer peripheral portion of said honeycomb-molding die meeting Sdc<Sdo.