an object of the present invention is to provide a nucleated tablet for contact lens cleaning that makes it possible to disinfect a cl simply and easily in the presence of a foaming component ; a cl cleaning preparation that contains the nucleated tablet ; and a method for cleaning a cl . the nucleated tablet for cl cleaning of the invention is a nucleated tablet including an outer shell that contains iodine - based bactericide , a carbonate , an organic acid , and a surfactant having , per partial weight of 2000 out of the molecular weight thereof , less than one hydroxyl group , and an inner nucleus that contains a neutralizing agent , a carbonate , an organic acid , and a surfactant , wherein the inner nucleus is coated for extended release .