Disclosed is a composition for preventing or treating periodontal diseases by using an ethanol extract of Zanthoxylum piperitum, the extract having effects of inhibiting the growth of periodontal disease-inducing bacteria, inhibiting the expression of MMP which destroys the extracellular matrix of periodontal tissues, and promoting bone regeneration of osteoblasts.Linvention concerne une composition pour prévenir ou traiter des maladies parodontales à laide dun extrait déthanol de Zanthoxylum piperitum, lextrait ayant des effets dinhibition de la croissance de bactéries induisant une maladie parodontale, inhiber lexpression de MMP qui détruit la matrice extracellulaire de tissus parodontaux, et favoriser la régénération osseuse des ostéoblastes.본 발명은 치주질환 유발균의 생장을 억제하고, 치주조직 세포외기질을 파괴하는 MMP의 발현을 저해하며 조골세포의 골재생을 촉진하는 활성을 지닌 초피나무 에탄올 추출물을 이용한 치주질환 예방 또는 치료용 조성물을 개시한다.