Provided is a composition for controlling plant diseases containing ethaboxam and fluopicolide, a seed treating agent containing ethaboxam and fluopicolide, a plant seed attached an effective amount of ethaboxam and fluopicolide, and a method for controlling plant diseases by applying an effective amount of ethaboxam and fluopicolide to a plant or soil for cultivating a plant. Thus this invention can provide a composition for controlling plant diseases having excellent plant disease controlling activity and a method for controlling plant diseases.本發明係關於含噻唑菌胺及氟比來之植物病害防除用組成物、含噻唑菌胺及氟比來之種子處理劑、以有效量之噻唑菌胺及氟比來附著之植物種子、以及以有效量之噻唑菌胺及氟比來施用於植物或栽培植物之土壤為特徵的植物病害防除方法。本發明可提供具優良植物病害防除效力之植物病害防除用組成物以及植物病害的防除方法。