<；P>；PROBLEM TO BE SOLVED: To provide an algae outgrowth inhibitor and an algae outgrowth suppressing method in which maintenance is easy or unnecessary and versatility is high, and which is cheap. <；P>；SOLUTION: The algae outgrowth inhibitor controls outgrowth of algae on a surface of goods, comprises making (a) a silicon-containing compound expressed by general formula (1), wherein R<；SP>；1<；/SP>；represents a hydrocarbon having a carbon number of 6 or more, R<；SP>；2<；/SP>；and R<；SP>；3<；/SP>；show a lower hydrocarbon group which may be the same or different, R<；SP>；4<；/SP>；shows a bivalent lower hydrocarbon group, R<；SP>；5<；/SP>；, R<；SP>；6<；/SP>；and R<；SP>；7<；/SP>；show a lower alkyl group or a lower alkoxy group which may be same or different, X shows a halogen ion or an organic carbonyloxy ion, uniformly disperse in water by (b) at least one surfactant chosen from a group consisting of a cationic surfactant (however, excluding the silicon compound) (b1), a nonionic surfactant (b2), and an ampholytic surfactant (b3). <；P>；COPYRIGHT: (C)2010,JPO&INPIT
