PROBLEM TO BE SOLVED: To provide a perforation position correcting device in which the positioning accuracy of the transferred shellfish is improved and the perforation is accomplished accurately, and thereby the efficiency of perforation of the shellfish is improved.SOLUTION: A perforation position correcting device for correcting the posture of the shellfish in the perforation is provided in multiple tables provided in a turntable part. The perforation position correcting device comprises: a positioning post 34 coming into abutment with a side edge 4a of the shell and forming (a) point, and coming into abutment with the side surface of a front ear-shaped protrusion 3a of the shell and forming b point； turnable pressing means 44 for pressing the shell from the direction of a rear ear-shaped protrusion 3b of the shell； and turnable pressing means 41 for pressing the shell from the direction of a ventral edge 4b of the shell. An ear-shaped protrusion 3 of the shellfish set in the perforation position is held from both ends between a shellfish presser groove 34a of the positioning post and a shellfish presser groove 45a of the pressing means, and the recoil motion to the upper part in the perforation is suppressed by a shellfish presser 41b of the pressing means, and thereby the tilt motion in the perforation is prevented and the holding of the shellfish is stabilized to enable perforation accurately.SELECTED DRAWING: Figure 9【課題】乗せ換えられた貝の位置決め精度の向上を図り、穿孔が正確になされること。貝の穿孔効率を良好にすること。【解決手段】ターンテーブル部に複数個設けられるテーブルに、穿孔時の貝の姿勢を矯正する穿孔姿勢矯正装置が設けられる。該穿孔姿勢矯正装置は、貝殻の側縁４ａに当接してａ点を形成するとともに貝殻の前耳状突起３ａの側面に当接してｂ点を形成する位置決めポスト３４と、貝殻の後耳状突起３ｂ方向から押圧する回動自在の押圧手段４４と、貝殻の腹側縁４ｂ方向から押圧する回動自在の押圧手段４１とからなる。位置決めポストの貝押え溝３４ａと押圧手段の貝押え溝４５ａとの間で穿孔位置にセットされた貝の耳状突起３を両端部から挟持するとともに、押圧手段の貝押え４１ｂにより穿孔時の上方への反動動作を抑圧することにより、穿孔時のあおり動作が防止され、貝の保持が安定し、正確に穿孔する。【選択図】図９
