A manufacturing method of a honeycomb structure comprising: a forming step of forming a forming raw material, and forming a honeycomb formed body (1, 40, 50) having partition walls defining a plurality of cells which extend from one end face (2a, 41, 51) to the other end face and which become through channels for a fluid, by extrusion, cutting and drying; a convex end portion (3, 42, 52) forming step of forming a convex end portion (3, 42, 52) projecting from the vicinity of a center of the one end face (2a, 41, 51) of the honeycomb formed body (1, 40, 50) obtained by the forming step along a central axis direction of the honeycomb formed body (1, 40, 50) and comprising a planar convex end face (3a, 42a, 52a), and processing the one end face (2a, 41, 51) so that its cross section has a convex shape, characterized in that it further comprises: a mounting step of directing downward the side of the one end face (2a, 41, 51) on which the convex end portion (3, 42, 52) is formed, and mounting the honeycomb formed body (1, 40, 50) on a shelf plate so that a part of the convex end portion (3, 42, 52) abuts on a shelf plate surface; a firing step of firing the honeycomb formed body (1, 40, 50) mounted on the shelf plate, to form a honeycomb fired body; and an end face grinding step of grinding the one end face (2a, 41, 51) of the honeycomb fired body obtained by the firing step, to remove the convex end portion (3, 42, 52). a forming step of forming a forming raw material, and forming a honeycomb formed body (1, 40, 50) having partition walls defining a plurality of cells which extend from one end face (2a, 41, 51) to the other end face and which become through channels for a fluid, by extrusion, cutting and drying; a convex end portion (3, 42, 52) forming step of forming a convex end portion (3, 42, 52) projecting from the vicinity of a center of the one end face (2a, 41, 51) of the honeycomb formed body (1, 40, 50) obtained by the forming step along a central axis direction of the honeycomb formed body (1, 40, 50) and comprising a planar convex end face (3a, 42a, 52a), and processing the one end face (2a, 41, 51) so that its cross section has a convex shape, characterized in that it further comprises: a mounting step of directing downward the side of the one end face (2a, 41, 51) on which the convex end portion (3, 42, 52) is formed, and mounting the honeycomb formed body (1, 40, 50) on a shelf plate so that a part of the convex end portion (3, 42, 52) abuts on a shelf plate surface; a firing step of firing the honeycomb formed body (1, 40, 50) mounted on the shelf plate, to form a honeycomb fired body; and an end face grinding step of grinding the one end face (2a, 41, 51) of the honeycomb fired body obtained by the firing step, to remove the convex end portion (3, 42, 52). a mounting step of directing downward the side of the one end face (2a, 41, 51) on which the convex end portion (3, 42, 52) is formed, and mounting the honeycomb formed body (1, 40, 50) on a shelf plate so that a part of the convex end portion (3, 42, 52) abuts on a shelf plate surface; a firing step of firing the honeycomb formed body (1, 40, 50) mounted on the shelf plate, to form a honeycomb fired body; and an end face grinding step of grinding the one end face (2a, 41, 51) of the honeycomb fired body obtained by the firing step, to remove the convex end portion (3, 42, 52).