The present invention relates to Cutibacterium avidum GENSC01 strain (KCTC 13596BP). The present invention also relates to a composition comprising the strain or its culture, and use thereof. The present invention is effective in improvement, prevention or treatment of atopic dermatitis, acne or skin inflammation by fine dust.本發明係關於貪婪丙酸桿菌(Cutibacterium avidum)GENSC01菌株(KCTC 13596BP)。本發明亦係關於包含該菌株或其培養物之組合物,及其用途。本發明可有效地改善、預防或治療異位性皮膚炎、痤瘡或由細粉塵導致之皮膚發炎。