PROBLEM TO BE SOLVED: To remove hard deposits from a shell surface of a shell having a large individual difference in size and shape so as not to leave behind. SOLUTION: A deposit removing device 10 has a conveyor 11 that supports rock oyster B, which is a shellfish, a rotating shaft 32 that is arranged so as to face the conveyor, and a root portion connected to the rotating shaft by rotation of the rotating shaft. It includes one or more chains 31 whose tip hits rock oyster B, and rods 22 which are arranged on both sides of the chain trajectory C drawn by the rotation of the rotation shaft 32 and press the rock oyster B against the conveyor. , Remove hard deposits such as fujitsubo from rock oyster B. [Selection diagram] Fig. 1【課題】サイズおよび形状の個体差の大きな貝の貝殻表面から、硬質付着物を、取り残しのないように除去する。【解決手段】付着物除去装置１０は、貝である岩牡蠣Ｂを支持するコンベヤ１１と、コンベヤと向き合って配置される回転軸３２と、根元部が回転軸に連結されて回転軸の回転によって先端部が岩牡蠣Ｂに当たる１または複数の鎖３１と、回転軸３２が回転することによって描かれる鎖の軌道Ｃの両側にそれぞれ配置されて、岩牡蠣Ｂをコンベヤに押圧するロッド２２とを備え、岩牡蠣Ｂからフジツボ等の硬質付着物を除去する。【選択図】図１
