**Abstract**

Antibody mediated rejection (ABMR) presents a significant challenge for long term graft survival in kidney transplantation. New technologies, including genomic studies and assays to detect and define donor-specific antibodies, have provided important insights into the pathophysiology and diagnosis of ABMR. Unfortunately, this progress has not yet translated into better outcomes for patients, as in the absence of a drug able to suppress antibody generation by plasma cells, available therapies can only slow down graft destruction. This chapter reviews the current understanding of ABMR, and details its diagnosis, and treatments, both those established in current routine clinical practice and those on the horizon.

**Keywords:** antibody mediated rejection, humoral rejection, kidney rejection, kidney transplantation, kidney transplant rejection, donor specific antibodies
