The present invention provides a fungicidal composition useful as an agricultural and horticultural fungicide having remarkably improved controlling effects against plant diseases, and a method for controlling plant diseases using the composition. A fungicidal composition comprising, as active ingredients, (a) 3-(2,3,4-trimethoxy-6-methylbenzoyl)-5-chloro-2-methoxy-4-methylpyridine or its salt and (b) captan, and a method for controlling plant diseases, which comprises applying the fungicidal composition to plants.本發明之課題係提供適用於作為大幅提升對植物病害之防治效果之農園藝用殺菌劑之殺菌劑組成物及使用該組成物之植物病害之防治方法。本發明之解決手段係提供以含有(a)3-(2,3,4-三甲氧基-6-甲基苯甲醯基)-5-氯-2-甲氧基-4-甲基吡啶或其鹽、及(b)卡丹(Captan)作為有效成份為特徵之殺菌劑組成物、施用前述殺菌劑組成物於植物為特徵之植物病害之防治方法。