PROBLEM THERE ARE PROVIDED A COMPOSITION FOR CONTROLLING PLANT DISEASES AND A METHOD FOR CONTROLLING PLANT DISEASES HAVING EXCELLENT CONTROL EFFECT FOR PLANT DISEASES. SOLUTION A COMPOSITION FOR CONTROLLING PLANT DISEASES COMPRISING, AS ACTIVE INGREDIENTS, A COMPOUND REPRESENTED BY FORMULA (1) WHEREIN X1 REPRESENTS A METHYL GROUP, A DIFLUOROMETHYL GROUP OR AN ETHYL GROUP X2 REPRESENTS A METHOXY GROUP OR A METHYLAMINO GROUP AND X3 REPRESENTS A PHENYL GROUP, A 2-METHYLPHENYL GROUP OR A 2,5—DIMETHYLPHENYL GROUP, AND AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF TOLCLOFOS-METHYL, METALAXYL AND MEFENOXAM, AND A METHOD FOR CONTROLLING PLANT DISEASES USING THE COMPOSITION.