PROBLEM TO BE SOLVED: To provide a fastening pin left on a rope after harvesting scallops, enabling itself to be easily pulled out mechanically or manually, thus enabling itself to be easily pulled out of the rope efficiently and smoothly.SOLUTION: The fastening pin 10 for cultivating scallops is provided, which includes: harpoon-like fastening parts 15 and 15 on both sides of a rod-like shaft 11 respectively； and two rope antislipping-off pieces 17 and 17 on the circumference midway of the shaft 11； and is formed wholly integratedly as for the respective parts with a synthetic resin. In this fastening pin 10, there are provided recessed parts 19 from a point just under the rope antislipping-off pieces 17 and 17 to the shaft circumference on the fastening parts side so as to house the rope antislipping-off pieces 17 and 17 therein when they fall.【課題】帆立貝収穫後に、ロープに残留する係止ピンを、機械、或いは人力によっても、容易に抜脱することができるようにし、係止ピンのロープからの抜脱を効率良く、円滑に行いことができるようにした係止ピンを提供したい。【解決手段】棒状の軸部１１の両端部に銛状の係止部１５，１５を有し、軸部中間部周に二本のロープ抜止片１７，１７を有し、合成樹脂で各部を全一体に成形した帆立貝養殖用の係止ピン１０であって、ロープ抜止片の直下から係止部側の軸部周かけて、ロープ抜止片の倒れを収容する凹部１９を設けた帆立貝養殖用の係止ピン。【選択図】図４
