PURPOSE: A cosmetic composition for preventing and treating diaper dermatitis is provided to prevent rash and atopic dermatitis by diaper dermatitis. CONSTITUTION: A cosmetic composition for preventing and treating diaper dermatitis contains 0.1-30.0 weight% of zinc oxide and 0.01-20.0 weight% of irritation relieving complex as active ingredients. The irritation relieving complex comprises Phaseolus aureus extract, Betula Platyphylla Japonica extract and Rumex crispus extract. The cosmetic composition is used in the form of solution, suspension, emulsion, paste, gel, cream, powder, soap, sufectant-containing cleansing oil, or spray.본 발명은 기저귀 피부염 예방 및 치료용 화장료조성물에 관한 것으로, 상세하게는 징크옥사이드 (Zinc oxide)와 녹두추출물, 자작나무추출물 및 소루쟁이추출물로 이루어진 자극완화복합체를 함유하여 기저귀 피부염으로 인한 발진 및 아토피 피부염 개선에 효과가 있는 베이비용 화장료 조성물에 관한 것이다.