A method for processing an orifice, comprising: a first step of selecting any one of a plurality of punches which are disposed, on a base movable in orthogonal triaxial directions, so as to have an axis in a horizontal direction, a positional relationship of the punch relative to a work held in a chuck, on a table rotatable about orthogonal biaxial directions, is stored in a memory; a second step of, following the first step, positioning the punch by moving the base in a first axis direction that is perpendicular to a vertical direction and a punch axis direction, and in the vertical direction; a third step of positioning the work by oscillating and rotating the table about a second axis in the vertical direction and a third axis in the horizontal direction oscillatable about the second axis; a fourth step of, following the second and third steps, pressing to process the work by moving the punch straightforwardly in the punch axis direction; a fifth step of, following the fourth step, removing the punch from the work by moving the punch straightforwardly in a direction opposite the straightforward direction in the fourth step; wherein a recessed portion having an axis inclined relative to a central axis of the work is formed on a surface of the work by performing steps from the first through to the fifth steps, after the recessed portion has been formed, another recessed portion having an axis inclined relative to the central axis of the work at different angle from the axis of the recessed portion is formed at a position different from the recessed portion, using the punch used for pressing to process the recessed portion, by performing steps from the second through to the fifth steps, to thereby form a plurality of recessed portions;after the plurality of recessed portions have been formed, another punch that is different from that used for pressing to process the plurality of recessed portions is selected by performing the first step with the work held in the chuck, and a blind hole for the orifice is processed in any one of the plurality of recessed portions by performing steps from the second through to the fifth steps; after the blind hole for the orifice has been processed, another blind hole for the orifice is processed using the punch used for processing the blind hole for the orifice in another recessed portion of the plurality of recessed portions by performing steps from the second through to the fifth steps, to thereby process a plurality of sets of shouldered holes including the orifice and the recessed portion disposed at an outlet opening portion of the orifice so that the shouldered holes are angled relative to the central axis of the work differently at least between two sets. a first step of selecting any one of a plurality of punches which are disposed, on a base movable in orthogonal triaxial directions, so as to have an axis in a horizontal direction, a positional relationship of the punch relative to a work held in a chuck, on a table rotatable about orthogonal biaxial directions, is stored in a memory; a second step of, following the first step, positioning the punch by moving the base in a first axis direction that is perpendicular to a vertical direction and a punch axis direction, and in the vertical direction; a third step of positioning the work by oscillating and rotating the table about a second axis in the vertical direction and a third axis in the horizontal direction oscillatable about the second axis; a fourth step of, following the second and third steps, pressing to process the work by moving the punch straightforwardly in the punch axis direction; a fifth step of, following the fourth step, removing the punch from the work by moving the punch straightforwardly in a direction opposite the straightforward direction in the fourth step; wherein a recessed portion having an axis inclined relative to a central axis of the work is formed on a surface of the work by performing steps from the first through to the fifth steps, after the recessed portion has been formed, another recessed portion having an axis inclined relative to the central axis of the work at different angle from the axis of the recessed portion is formed at a position different from the recessed portion, using the punch used for pressing to process the recessed portion, by performing steps from the second through to the fifth steps, to thereby form a plurality of recessed portions;after the plurality of recessed portions have been formed, another punch that is different from that used for pressing to process the plurality of recessed portions is selected by performing the first step with the work held in the chuck, and a blind hole for the orifice is processed in any one of the plurality of recessed portions by performing steps from the second through to the fifth steps; after the blind hole for the orifice has been processed, another blind hole for the orifice is processed using the punch used for processing the blind hole for the orifice in another recessed portion of the plurality of recessed portions by performing steps from the second through to the fifth steps, to thereby process a plurality of sets of shouldered holes including the orifice and the recessed portion disposed at an outlet opening portion of the orifice so that the shouldered holes are angled relative to the central axis of the work differently at least between two sets.