The present invention provides a composition for controlling plant disease comprising a carboxamide compound represented by a formula (I): wherein R 1 represents a hydrogen atom or a methyl group, and R 2 represents a methyl group, a difluoromethyl group or a trifluoromethyl group; and a compound represented by a formula (A): , which has an excellent controlling activity on plant diseases.COMPOSICIÓN AGROQUÍMICA FUNGICIDA QUE COMPRENDE UNA CARBOXAMIDA Y UNA ACETAMIDA; MÉTODO QUE EMPLEA DICHA COMPOSICIÓN PARA COMBATIR HONGOS FITOPATÓGENOS Y CON ELLO PROTEGER VEGETALES DE ENFERMEDADES CAUSADAS POR DICHOS HONGOS FITOPATÓGENOS.