A COMPOSITION HAVING A STABLE AND HIGH FUNGICIDAL EFFECT AGAINST A CULTIVATED CROP INFECTED BY A PLANT PATHOGEN IS PROVIDED. AN AGRICULTURAL OR HORTICULTURAL FUNGICIDE COMPOSITION CONTAINING, AS ACTIVE INGREDIENTS, (A) FLUAZINAM OR ITS SALT AND (B) A STROBILURIN COMPOUND OR ITS SALT IS PROVIDED； IN ADDITION, A METHOD FOR CONTROLLING A PLANT PATHOGEN BY APPLYING THE SUBJECT AGRICULTURAL OR HORTICULTURAL FUNGICIDE COMPOSITION TO A PLANT OR A SOIL IS PROVIDED； AND FURTHERMORE, A METHOD FOR CONTROLLING A PLANT PATHOGEN BY APPLYING (A) FLUAZINAM OR ITS SALT AND (B) A STROBILURIN COMPOUND OR ITS SALT TO A PLANT OR A SOIL IS PROVIDED.
