PROBLEM TO BE SOLVED: To provide a locking pin for scallop aquaculture in which the insertion of the locking pin containing a locking piece to a locking hole is easy and smooth, and the ear-hanging locking of a scallop can be executed smoothly and quickly with good work efficiency without damaging the locking piece.SOLUTION: A locking pin 1 for scallop aquaculture includes: a locking piece 5 having a sharp insertion part 3 in the tip part, and constituting a holding unit of a scallop provided inside this axial direction； a storage part 6c of the locking piece 5 provided in the lower shaft part of the locking part of a shaft part 6 stored when constricting a locking part； and a rope retaining part provided further in the inward part in the shaft direction of the shaft part 6. The locking pin for the scallop aquaculture is integrally formed of each part all together in synthetic resin. The locking pin for the scallop aquaculture is provided with stepped parts 11, 12 becoming alternate in the width direction in the lower surface 9 and the upper surface 10 of the lower shaft part 6 of the locking piece 5.SELECTED DRAWING: Figure 2【課題】係止片を含む係止ピンの係止孔への挿入が円滑、容易で、帆立貝の耳吊り係止を係止片を傷めることなく、作業効率よく、円滑、迅速に実施し得る帆立貝養殖用の係止ピンを提供する。【解決手段】先端部に尖鋭な挿入部３を有し、この軸方向内方に設けた帆立貝の保持部を構成する係止片５と、係止部を狭窄時に収容する軸部６の係止部の下軸部に設けた係止片５の収容部６ｃと、軸部６の軸方向のさらなる内方部に設けたロープ抜止部を備え、合成樹脂で各部全一体に形成された帆立貝の耳吊り養殖用係止ピン１であって、係止片５の下面９と下軸部６の上面１０に、幅方向に互い違いとなる段差部１１，１２を設けた帆立貝養殖用係止ピン。【選択図】図２
