Manufacturing method of honeycomb structure and honeycomb formed body

A manufacturing method of a honeycomb structure comprising:

• a forming step of forming a forming raw material, and extruding, cutting and drying the material to form a honeycomb formed body having partition walls defining a plurality of cells which extend from one end face to the other end face and which become through channels for a fluid;
• a convex wall portion forming step of forming a convex wall portion projected from the vicinity of a circumferential edge of the one end face of the honeycomb formed body obtained by the forming step along a central axis direction of the honeycomb formed body, and processing the one end face so that its cross section has a concave shape;
• a mounting step of directing downward the side of the one end face on which the convex wall portion is formed, and mounting the honeycomb formed body on a shelf plate so that the convex wall portion abuts on a shelf plate surface;
• a firing step of firing the honeycomb formed body mounted on the shelf plate, to form a honeycomb fired body;
• and
• a circumference grinding step of grinding a circumferential surface of the honeycomb fired body obtained by the firing step, to remove the convex wall portion.