The present invention relates to a Phyllostachyos Caulis in Taeniam extract which has efficacy on improving dry skin caused by skin aging, and to a skin-moisturizing composition for skin external application containing the same. More specifically, the present invention relates to a composition for skin external application, which exhibits excellent effects of improving dry skin and moisturizing skin, by means of the Phyllostachyos Caulis in Taeniam extract. According to the present invention, the Phyllostachyos Caulis in Taeniam extract promotes activity of hyaluronic acid synthase (HAS), and has capability of retaining moisture by hyaluronic acid and also promoting production of filaggrin which is a precursor of a natural moisturizing factor (NMF).COPYRIGHT KIPO 2016본 발명은 피부노화에 따른 피부의 건조 개선 효능을 갖는 죽여 추출물, 이를 함유한 피부 보습용 외용제 조성물에 관한 것으로, 보다 상세하게는 죽여 추출물의 히알루론산 합성효소(Hyaluronic acid, HAS)활성 촉진을 통해 히알루론산(Hyaluronic acid)에 의한 수분 함유 능과 NMF(Natural Moisturizing factor) 전구체인 필라그린 생성 촉진 능을 갖는 죽여 추출물에 의해 피부건조의 개선 및 피부보습효과가 우수한 외용제 조성물에 관한 것이다.
