The present invention relates toCutibacterium granulosumGENSC02 strain (KCTC 13597BP). 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 acne, atopic dermatitis or skin inflammation by fine dust.本發明係關於顆粒丙酸桿菌(Cutibacterium granulosum)GENSC02菌株(KCTC 13597BP)。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、預防或治療痤瘡、異位性皮膚炎或由細粉塵導致之皮膚發炎。