PURPOSE: A cosmetic composition containing columbianetin isolated from an Aralia cordata var. continentalis extract is provided to suppress melanogenesis with safety, to ensure whitening effect with solubility and stability.CONSTITUTION: A cosmetic composition for skin whitening contains columbiatin or an Aralia cordata var. continentalis extract as an active ingredient. The Aralia cordata var. continentalis extract is a methanol extract of Aralia cordata var. continentalis. The cosmetic composition is manufactured in the form selected from the group consisting of an external use skin ointment, a cream, a skin softener, a lotion, a pack, an essence, a hair tonic, a shampoo, a rinse, a hair conditioner, a hair treatment, a gel, a skin toner, an astringent, a milk lotion, a moisture lotion, a nutrition lotion, a massage cream, a nutrition cream, a hand cream, a foundation, a nutrition essence, a sun screen, a soap, a cleansing foam, a cleansing lotion, a body lotion, and a body cleanser.COPYRIGHT KIPO 2013본 발명은 멜라닌 생성 억제 효과가 우수한 콜롬비아네틴 (columbianetin, CAS no. 3804-70-4, 분자식 C14H14O4, 분자량 246.26) 또는 이를 포함하는 독활 추출물을 유효성분으로 함유하는 피부 미백용 화장료 조성물을 제공한다.