Important advances in the treatment landscape of multiple myeloma (MM) had been seen over the past two decades leading to improved overall survival but despite the progress multiple myeloma is still considered incurable and the prognosis of the pentarefractory patients have been poor. The development of immunotherapy and in particular adoptive cell therapy with chimeric antigen receptor (CAR) T cells have dramatically improved the outcomes of heavily pretreated relapsed/refractory MM patients. The bulk of CAR T-cell constructs currently in clinical development target the B-cell maturation antigen (BCMA) and to date only idecabtagene vicleucel (ide-cel) is approved by the Food and Drug Administration (FDA) for commercial use in adult patients with relapsed or refractory MM based on the promising clinical responses and positive safety record shown in the pivotal KarMMa study. This review focus on the development of CAR T-cell therapy for multiple myeloma as well as a brief review of the mechanisms of resistance, toxicity and new approaches under development.