PURPOSE: A composition for skin moisturizing and promoting hair growth using Cinnamomum camphora extract is provided to suppress 5alpha-reductase. CONSTITUTION: A composition for skin moisturizing contains Cinnamomum camphora extract. A composition for promoting hair growth or preventing alopecia contains the extract. The extract is isolated using leaves, stems, fruits, seeds, flowers, or mixture thereof using water, ethanol, or mixture solvent thereof. The composition is a cosmetic composition for skin or hair. The cosmetic composition is used in the form of emulsion, lotion, cream, gel, pack, or powder.본 발명은 녹나무 추출물을 이용한 피부 보습용 조성물 및 발모 촉진 또는 탈모 방지용 조성물을 개시한다.녹나무 추출물이 임상실험에 있어서 피부 보습 활성과 발모 촉진 또는 탈모 방지 활성을 가지고, 또 탈모를 촉진하는 것으로 알려진 5α-리덕타아제의 억제 활성을 가진다.