<；P>；PROBLEM TO BE SOLVED: To provide a water-based antifouling coating composition containing decreased amount of volatile organic compounds (VOC) supposed as a causal material for global warming in the antifouling agent, keeping excellent antifouling effect and storage stability for a long period, and having good workability such as drying property. <；P>；SOLUTION: The water-based antifouling coating composition comprises (A) an aqueous dispersion emulsion of a dialkyl sulfide compound expressed by general formula (I) R<；SP>；1<；/SP>；-(S)<；SB>；n<；/SB>；-R<；SP>；2<；/SP>；(R<；SP>；1<；/SP>；and R<；SP>；2<；/SP>；are each a 1-20C straight or branched-chain alkyl group； and n is an integer of 1-20) in the binder constitution component of the water-based antifouling coating material. <；P>；COPYRIGHT: (C)2008,JPO&INPIT
