The present invention provides an apoptosis inducer and a therapeutic agent for eosinophilic diseases which comprises, as an active ingredient, an antibody which reacts specifically with eosinophils and induces apoptosis of eosinophils; and a method for inducing eosinophil apoptosis using the antibody, and a method for specifically reducing or removing eosinophils in peripheral blood or tissues using the antibody.
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