There is provided a plant disease controlling composition comprising, as active ingredients, a compound represented by the formula (I): as well as at least one compound A selected from the group consisting of a compound represented by the formula (II) and an agrochemically acceptable salt of the compound represented by the formula (II): wherein, R1, Q, X, Y, Z, M and n are as defined in the description. Also provided is a method for controlling a plant disease, which comprises applying the compound represented by the formula (I) as well as at least one compound A selected from the group consisting of the compound represented by the formula (II) and an agrochemically acceptable salt of the compound represented by the formula (II) to a plant, a seed of a plant or a cropland.
