This invention provides a self-emulsifyingcomposition comprising: (a) 50 to 95% by weight in total of atleast one .omega.3 polyunsaturated fatty acid, a pharmaceuticallyacceptable salt thereof or a pharmaceutically acceptable esterthereof； (b) 3 to 40 parts by weight of a lecithin based on 100parts by weight of the component (a)； (c) 10 to 50 parts byweight of an emulsifier having a hydrophilic lipophilic balance(HLB) of at least 10 based on 100 parts by weight of thecomponent (a)； and (d) an ethanol content up to 4% by weight inrelation to the total composition. The composition exhibitsexcellent self-emulsifying property, dispersibility in thecomposition, emulsion stability, and absorption property. Thecomposition is adapted for use as a drug.
