The results of transplantation from a living donor (LDT) are constantly better than those of cadaveric transplantation (2004 Report of the French Agency of Biomedicine: graft survival 80 versus 63% at 10 years). Transplantation from an HLA-identical sibling is in any case the best combination, but there is no significant difference in graft survival when the donor is a parent, a child, a non HLA-identical sibling, a spouse or an unrelated person. The reasons for these better results are several: the quality of the kidney transplant, the absence of brain death, the advantage of a programed surgery and of preemptive transplantation. It is admitted now that HLA compatibility plays a minor role. As in cadaveric transplantation, acute rejection, delayed graft function, pretransplant HLA immunisation, age of the donor and the recipient and possibly the discrepancy between the weight of the donor and the recipient are determinants of transplant outcome. (C) 2007 Elsevier Masson SAS et Association Societe de Nephrologie. Tous droits reserves.