Disclosed is a semiconductor nanoparticle having excellent chemical durability and high luminescence properties. The chemical durability of the particle is provided by coating the semiconductor nanoparticle having high luminescence properties dispersed in an organic solvent using a surface-active agent, an amphipathic molecule, and a lipid composed of a combination of two or more parts selected from a polar part, a hydrophobic part, a hydrophilic part, and a functional part (herein, the hydrophobic part is a necessary element and the hydrophilic part and the functional part may be combined).