The present invention relates to: an antibody, particularly a monoclonal antibody, a chimeric antibody, a humanized antibody and a human antibody, which specifically recognize human α9 integrin; a hybridoma cell which produces the monoclonal antibody; a method for producing the monoclonal antibody; a method for producing the hybridoma cell; a therapeutic agent comprising the anti-human α9 integrin antibody; a diagnostic agent comprising the human α9 integrin antibody; and a method for screening a compound which inhibits the activity of human α9 integrin.