The present invention relates to an anti-PD-L1 antibody, an antigen-binding fragment thereof, and a medical use thereof. Furthermore, the present invention provides a chimeric antibody and a humanized antibody comprising the CDR region of the anti-PD-L1 antibody of the present invention, a pharmaceutical composition comprising the anti-PD-L1 antibody of the present invention and an antigen-binding fragment thereof, and an anticancer agent As regards their use. Specifically, the present invention relates to humanized anti-PD-L1 antibodies and their use in the manufacture of a medicament for the treatment of PD-L1-mediated diseases or disorders. [Selection figure] None本発明は、抗PD-L1抗体、その抗原結合フラグメントおよびその医療用途に関する。さらに本発明は、本発明の抗PD-L1抗体のCDR領域を含むキメラ抗体およびヒト化抗体、ならびに本発明の抗PD-L1抗体およびその抗原結合フラグメントを含む医薬組成物、ならびに抗がん剤としてのそれらの用途に関する。具体的には、本発明は、ヒト化抗PD-L1抗体およびPD-L1介在性の疾患または障害を治療するための薬物の製造における、その使用に関する。【選択図】なし