The present invention relates to a novel long-acting palmitate-binding GnRH derivative of gonadotropin-releasing hormone (GnRH) and a pharmaceutical composition containing the same. Through the excellent bioavailability and increased half-life of the GnRH derivative of the present invention, it is expected to greatly contribute to the reduction of dosage frequency and dosage in the treatment of sex hormone-dependent diseases. In particular, the disadvantages of the existing GnRH sustained-release formulation, which had the side effects of residual injection site and pain, can be overcome.本発明は、生殖腺刺激ホルモン放出ホルモン(gonadotrophin-releasing hormone;GnRH)の新規の持続型パルミチン酸結合GnRH誘導体及びこれを含む薬剤学的組成物に関するものである。本発明のGnRH誘導体の優れた生体利用率及び増加した血中半減期を通じて、性ホルモン-依存性疾患の治療において医薬の投薬頻度や投薬量の減少などに大きく寄与すると期待される。特に、既存の、注射部位の残存感と痛みの副作用を有していたGnRH徐放型製剤の短所を克服できる。