PURPOSE: A fermented placental composition is provided to enhance high amino acid content and to be used as an ingredient for cosmetic products and food. CONSTITUTION: A method for making a fermented placental composition comprises: a step of crushing mammal placenta; a step of adding 3-30 weight parts of carbon source and energy source of microorganism and mixing; and a step of inoculating lactobacillus, yeast, or bacillus into the mixture and fermenting. The carbon source and energy source of microorganism is oligosaccharide, lactose, glucose, fructose, sugar, or mixture thereof. The lactobacillus is Lactobacillus sp., Streptococcus sp., Pediococcus sp., Leuconostoc sp., or Bifidobacterium sp. The yeast is Saccharomyces sp. A composition for treating atopic dermatitis contains the fermented placental composition as an active ingredient.본 발명은 발효 태반 조성물과 그 용도를 개시한다. 구체적으로 포유류 태반을 분쇄한 후에 여기에 적당한 젖산균 등의 탄소원과 에너지원을 첨가하여 혼합하고 그 혼합물에 젖산균, 효모 및/또는 바실러스 속 미생물을 접종하여 발효시켜 얻어진 발효 태반 조성물과 그 용도를 개시한다.