The present invention provides bispecific antibody constructs of a specific Fc modality characterized by comprising a first domain binding to a target cell surface antigen, a second domain binding to an extracellular epitope of the human and/or theMacacaCD3ε chain and a third domain, which is the specific Fc modality. Moreover, the invention provides a polynucleotide, encoding the antibody construct, a vector comprising this polynucleotide, host cells, expressing the construct and a pharmaceutical composition comprising the same.本發明提供特定Fc模態之雙特異性抗體構築體,其特徵在於包含結合至靶細胞表面抗原之第一結構域、結合至人類及/或獼猴屬(Macaca)CD3ε鏈之細胞外表位之第二結構域、及呈該特定Fc模態之第三結構域。此外,本發明提供編碼該抗體構築體之聚核苷酸、包含此聚核苷酸之載體、表現該構築體之宿主細胞及包含該構築體之醫藥組合物。