According to one embodiment of the present invention, an antibiotic composition which includes at least one membrane extract of a chorion membrane and an amnion membrane including an epithelial layer as an active ingredient is provided. An object of the present invention is to provide a composition exhibiting excellent antibiotic activity against various bacteria while suppressing an occurrence of side effects.COPYRIGHT KIPO 2018본 발명의 일실시예에 따르면, 융모막(chorion membrane) 및 상피세포층을 포함하는 양막(amnion membrane) 중 하나 이상의 막 추출물을 유효성분으로 포함하는, 항균용 조성물이 제공된다.