Mantle cell lymphoma is a rare form of non Hodgkin lymphomas. Diagnosis is made by demonstrating a typical immunophenotype as well as the presence of a translocation between chromosomes 11 and 14 with overexpression of cyclin D1. First line therapy for young patients consists in 3 cycles of "R-CHOP21" alternated with 3 "R-DHAP21" and followed by an autograft conditioned by total body irradiation, cyclophosphamide and aracytine. For patients over 65 years of age, the treatment of choice consists in 8 cycles of "R-CHOP21". Maintenance treatment is under evaluation. Allografting is the only chance of cure in relapsed patients with good performance status. Targeted therapies will improve the prognosis of this disease.