A recombinant antibody or the antibody fragment thereof which specifically
reacts with an extracellular domain of human CCR4; a DNA which encodes
the recombinant antibody or the antibody fragment thereof; a method for
producing the recombinant antibody or the antibody fragment thereof; a
method for immunologically detecting CCR4, a method for immunologically
detecting a cell which expressed CCR4 on the cell surface, a method for
depleting a cell which expresses CCR4 on the cell surface, and a method
for inhibiting production of Th2 cytokine, which comprise using the
recombinant antibody according or antibody fragment thereof; a
therapeutic or diagnostic agent for Th2-mediated immune diseases; and a
therapeutic or diagnostic agent for a blood cancer.