PROBLEM TO BE SOLVED: To provide a coated metal plate having high algaproofness, whereby it is resistant to the attachment of algae.SOLUTION: A coated metal plate has a metal plate, and a coating layer that coats the metal plate and comprises a pyrithione compound. The content of the pyrithione compound is 0.5-15 mass% relative to the whole coating layer. The pyrithione compound comprises pyrithione metal salt, preferably zinc pyrithione. The coating layer, preferably, comprises polyester resin, or at least one of fluororesin and a cured product thereof, further comprises a silicon compound, particularly at least one of a silicate compound and a cured product thereof, and further comprises hydrotalcite.SELECTED DRAWING: None【課題】藻類が付着しにくい性質である防藻性の高い被覆金属板の提供。【解決手段】金属板と、この金属板を覆う、ピリチオン化合物を含有する被覆層とを備え、被覆層全体に対してピリチオン化合物が０．５～１５質量％の範囲内であり、ピリチオン化合物が、ピリチオン金属塩、好ましくは亜鉛ピリチオンを含有し、被覆層が、ポリエステル系樹脂、もしくは、フッ素系樹脂とその硬化物のうち少なくとも一方を含有し、更にケイ素化合物、特にシリケート化合物とその硬化物の少なくとも一方を含有し、更にハイドロタルサイト類を含有することが好ましい被覆金属板。【選択図】なし
