The present invention relates to a cosmetic composition for skin aging prevention, whitening, or tone enhancement comprising an extract of wrinkle clam, as an active ingredient, and a composition for external application for skin. The composition according to the present invention inhibits DPPH, PF, ABTS and TBARS, exhibiting an antioxidative effect, exhibiting a pore-shrinking effect by a convergence effect, inhibiting melanin production by inhibiting tyrosinase, exhibiting a whitening effect, It suppresses the activity, maintains the elastin molecular form, suppresses the collagenase activity, thereby exhibiting the wrinkle-reducing effect, and inhibits the inflammatory reaction by inhibiting the hyaluronidase activity, thereby exhibiting an anti-inflammatory effect.본 발명은 주름조개풀 추출물을 유효성분으로 포함하는 피부의 노화방지, 미백, 또는 결 개선용 화장료 조성물 및 피부 외용제 조성물에 관한 것이다. 본 발명에 따른 조성물은 DPPH, PF, ABTS 및 TBARS를 억제하여 항산화 효과를 가지고, 수렴효과에 의해 모공수축 효과를 나타내며, 티로시나아제를 저해함으로써 멜라닌 생성을 억제하여 미백효과를 나타내며, 엘라스타아제 활성을 억제하여 엘라스틴 분자 형태를 유지시키고, 콜라게나아제 활성을 억제시킴으로써 주름개선 효과를 나타내며, 히아루노니다제 활성억제에 의해 염증반응을 억제시켜 항염증 효과를 나타낸다.
