Osmia cornuta is a species of bee in the genus Osmia found in southern and central Europe, north to Belgium, and the southern parts of the Netherlands. They are of the solitary type; they do not live in colonies in hives like bumble bees and honey bees. They lack the pollen baskets on their hind tibiae; they do not produce honey, but they do use the pollen and nectar to stock their nests when they are ready.