A hyaluronic acid conjugates including hyaluronic acid, a disulfide bond-containing crosslinking agent, and a cationic, amphiphilic polymer； a hyaluronic acid-nucleic acid complex in which a nucleic acid is bound to the hyaluronic acid conjugate； a composition in which the hyaluronic acid-nucleic acid complexes are crosslinked with each other； a nucleic acid delivery composition including the hyaluronic acid-nucleic acid complex； and a method of nucleic acid delivery using the hyaluronic acid-nucleic acid complex.
