PURPOSE: The titled transparent and stable compounded oil, containing eicosapentaenoic acid, docosahexaenoic acid, fish oil, vegetable oil containing linoleic acid, phospholipid and tocopherol, prepared by dissolving the phospholipid in the fish oil, and having improved physiological activity and preservation quality.

CONSTITUTION: A liquid compounded oil obtained by incorporating (A) 50W 99wt% fish oil, containing ≥10wt% eicosapentaenoic acid and ≥7wt% docosahexaenoic acid, and having ≤-5°C cloud point or a highly unsaturated fatty acid concentrate thereof with (B) 5W40wt% vegetable oil containing ≥35wt% linoleic acid, e.g. olive oil, (C) 0.1W20wt% phospholipid, e.g. soybean lecithin, and (D) 0.2W40wt% tocopherol. An oil-soluble vitamin, oil-soluble natural dyestuff or propylene glycol, etc. may be incorporated therein as another component.