The present invention provides a composition for controlling plant diseases containing a compound represented by the following Formula (1):a compound represented by the following Formula (2):and a compound represented by the following Formula (3):In Formula (3), a combination of R1, R2, R3, and R4 is a combination in which R1 represents a methyl group, R2 represents a trifluoromethyl group, and both R3 and R4 represent a fluorine atom, or a combination in which both R1 and R2 represent a difluoromethyl group, R3 represents a chlorine atom, and R4 represents a methanesulfonyloxy group. The present invention also provides a method for controlling plant diseases, comprising applying an effective amount of the compound of Formula (1), the compound of Formula (2), and the compound of Formula (3) to a plant or soil for cultivating a plant, each having an excellent controlling activity on plant diseases.