The invention provides a plant disease and insect damage control composition including, as active ingredients, dinotefuran and at least one fungicidal compound; and a plant disease and insect damage prevention method that includes applying such a composition to a plant body, soil, plant seed, stored cereal, stored legume, stored fruit, stored vegetable, silage, stored flowering plant, or export/import timber. The invention provides a new plant disease and insect damage control composition and a plant disease and insect damage prevention method with very low toxicity to mammals and fishes, the composition and method showing an effect against plural pathogens and pest insects, including emerging resistant pathogens and resistant pest insect, by application to a plant body, soil, plant seed, stored cereal, stored legume, stored fruit, stored vegetable, silage, stored flowering plant, or export/import timber.