Offer the anti-bacterial medicine and the bactericide where safety quite is high, almost does not have the load for environment. Formula (i):[In formula, M1 and M2 in each independence, shows H, Ag and Cu. However, M1 or M2 is not H simultaneously. ]So the single salt which is displayed or the anti-bacterial medicine bactericide which designates the double salt as the active ingredient.安全性が極めて高く、環境に対する負荷がほとんどない抗菌剤及び殺菌剤を提供すること。式(I):[式中、M1及びM2は各々独立に、H、Ag又Cuを示す。但し、M1及びM2は同時にHでない。]で表される単塩又は複塩を有効成分とする抗菌剤・殺菌剤。