The present invention scallops locking pin of the insertion portion insertion portion angular caused by cutting of the distal end portion of the, sagging of the distal end face, beard, and eliminates the rough rough surface or the like, it is possible to eliminate it or angular an insertion portion, dripping and beard, a rough surface to ensure the surface is a smooth surface Te, to provide a locking pin to streamline the work of the scallop farming. A at both ends of the shaft portion 4 has a tip portion insertion portion 5 to be inserted into locking holes of the scallop, protrudes radially outward to axially inward portions of these tip portion insertion part, axial and a locking piece 6 which is inclined inwardly protrudes in the middle portion of the shaft portion in the "C" shape of the rope retaining piece radially outward, each section all integrally engagement for scallop aquaculture molded with resin A pin, at least one of the distal end portion of the tip portion insertion portion is formed in a smooth surface 5B which solidified after melting. .BACKGROUND 7【課題】 帆立貝係止ピンの挿入部の先端部の切断で生じる角張った挿入部、先端面の垂れ、ヒゲ、粗い粗面等を無くし、挿入部を角張ったり、垂れやヒゲ、粗面を無くして表面が滑らかな面となるようにし、帆立貝養殖の作業を効率化する係止ピンを提供する。【解決手段】軸部4の両端部に帆立貝の係止孔に挿入する先部挿入部5を有し、これらの先部挿入部の軸方向内方部位に径方向外方に突出し、軸方向内方に傾斜した係止片6を有し、軸部の中間部に「ハ」形にロープ抜止片を径方向外方に突出し、各部全一体的に樹脂で成形した帆立貝養殖用の係止ピンであって、先部挿入部の少なくとも一方の先端部は、溶融後固化した滑らかな面5Bで形成されている。【選択図】図7
