The present invention relates to anti-FcRH5 antibodies, including anti-FcRH5 antibodies (eg, FcRH5 T cell dependent bispecific (TDB) antibodies) comprising an FcRH5 binding domain and a CD3 binding domain, and methods of use thereof. [Selection figure] None本発明は、FcRH5結合ドメイン及びCD3結合ドメインを含む抗FcRH5抗体(例えば、FcRH5 T細胞依存性二重特異性(TDB)抗体)を含めた抗FcRH5抗体、ならびにその使用方法に関する。【選択図】なし