PURPOSE: A cosmetic composition containing Betula platyphylla var. japonica sap and Saccharum officinarum extract for skin moisturizing is provided to maintaining constant moisture and to protect cells. CONSTITUTION: A cosmetic composition for skin moisturizing contains 0.001-10.0 weight% of Betula platyphylla var. japonica sap and 0.001-30.0 weight parts% of Saccharum officinarum extract as an active ingredient. The cosmetic composition additionally contains 0.001-30.0 weight% of Thymus quinquecostatus extract. The cosmetic composition is manufactured in the form of skin softener, nutrition cream, massage cream, essence, eye cream, cleansing cream, cleansing foam, cleansing water, pack, or spray.본 발명은 피부 보습용 화장료 조성물에 관한 것이다. 보다 상세하게는 자작나무 수액, 사탕수수 추출물과 백리향 추출물을 함유하여 피부 보습 효과가 매우 우수한 화장료 조성물에 관한 것이다.