Disclosed is a plant disease control composition which has multiple disease spectra against various plant pathogenic bacteria and can exhibit an excellent control effect (a synergistic control effect) that is unpredictable from a single component. The plant disease control composition is characterized by comprising, as active ingredients, at least one quinoline compound represented by general formula (I) [wherein R, R independently represent an alkyl group which may be substituted, an aryl group which may be substituted, or the like； R and R independently represent H, an alkyl group which may be substituted, or the like； X represents a halogen atom, an alkyl group which may be substituted, or the like； Y represents a halogen atom, an alkyl group, or the like； n represents 0 to 4； and m represents 0 to 6] or a salt thereof (group a) and at least one bactericidal compound selected from the group consisting of a strobilurin compound, a triazole compound and others.
