An antibody capable of specifically binding to IL-17A and a functional fragment thereof, wherein the antibody or the functional fragment thereof is an IL-17A chimeric antibody and a functional fragment thereof, and a humanized IL-17A antibody and a functional fragment thereof. Includes functional fragments. [Selection diagram] FIG.特異的にIL-17Aに結合する可能な抗体及びその機能的断片であって、上記抗体又はその機能的断片は、IL-17Aキメラ抗体及びその機能的断片、並びにIL-17Aヒト化抗体及びその機能的断片を含む。【選択図】図3