The present invention relates to an antibody which has a therapeutic effect on tumors. Namely, the present invention relates to an antibody which binds to B7-H3 and exhibits antitumor activity. The objective of the present invention is to provide a pharmaceutical product which has a therapeutic effect on tumors. An anti-B7-H3 antibody which binds to B7-H3 and exhibits antitumor activity is obtained, and a pharmaceutical product for treating tumors, which contains the antibody, or the like is obtained.
