A composition containing a Codonopsis lanceolata extract for topical application is provided to enhance the deliver efficiency on the skin using polyethyleneglycol or oil-in-water emulsion. An agent for topical application, which contains Codonopsis lanceolata extract in oil-in-water emulsion as an active ingredient and comprises Codonopsis lanceolata extract in water phase. The oil-in-water emulsion comprises oil phase and water phase. The oil phase comprises polyglyceryl-3-methylglucose distearate, stearic acid, cetyl alcohol and fluid paraffin. The water phase contains glycerine.본 발명은 제형 안정성이 확보되고, 주약의 방출량이 뛰어난 더덕 추출물 함유 피부 도포용 국소 적용 제제를 제공한다.