Heretofore, in a feed for cultivation and/or livestock containing larvae and/or pupae of an insect such as flies and the like, the optimum content of insect larvae and/or pupae is about 0.5% by weight to about 25% by weight in terms of dry weight relative to the whole feed, and when giving a feed containing insect larvae and/or pupae in an amount over this range, invitation of growth retardation in the given animal was a problem. Although polysaccharides having a high immunostimulatory ability are contained in insects, the expected immunostimulatory effect is not obtained in some cases when insects are ingested as they are as a food or when insects are incorporated in a feed for aquaculture and/or animal husbandry and used. The present invention provides a production method of a composition for a food and/or a feed using an insect as a raw material, comprising a step of removing fat-soluble components contained in the insect with a solvent.
