A
monoclonal antibody is provided which binds to a human
CC chemokine receptor 1 (CCR1) and inhibits activation of the human CCR1, or an
antibody fragment thereof. The
monoclonal antibody binds to an
extracellular region of a human CCR1 and inhibits activation of the human CCR1 by a human
CC chemokine ligand 15 (CCL15). An antibody fragment thereof, a hybridoma producing the antibody, a
nucleic acid having a
nucleotide sequence encoding the antibody or the antibody fragment, a transformant
cell containing a vector containing the
nucleic acid, a method for producing the antibody or the antibody fragment using the hybridoma or the transformant
cell; a therapeutic agent and a
diagnostic agent containing the antibody or the antibody fragment, and a method for treating and diagnosing a CCR1-related
disease using the antibody or the antibody fragment are also provided.