The present invention relates to an anti-human .alpha.9 integrin antibody.Moreparticularly, the present invention relates to: a monoclonal antibody, achimeric antibody, ahumanized antibody and a human antibody that specifically recognize human.alpha.9 integrin；a hybridoma cell that produces the monoclonal antibody； a method for producingthemonoclonal antibody； a method for producing the hybridoma cell； a therapeuticagentcomprising the anti-human .alpha.9 integrin antibody； a diagnostic agentcomprising the human.alpha.9 integrin antibody； and a method for screening for a compound thatinhibits the activityof human .alpha.9 integrin.
