PROBLEM TO BE SOLVED: To provide a composition for oral or external use having useful functions of DHA, EPA and the like contained in a seafood oil by reducing odor peculiar to the seafood oil, or by reducing the odor to make the seafood oil widely applicable to pharmaceuticals, food, cosmetics or the like.SOLUTION: A composition is prepared by blending 1 pts.wt. of a seafood oil and at least 0.005 pts.wt. of ginkgolide together. As a material including ginkgolide, a ginkgo leaf extract is blended.