The frequency of HLA-DRB1*15 polymorphism, which is strongly associated to multiple sclerosis, was investigated in 84 adult patients with chronic dysimmune polyneuropathy and 272 healthy controls. No significant differences were detected between cases and controls and, among patients, according to gender, peripheral nerve antigen antibody seropositivity, and electrophysiological features. A trend towards an increase of HLA-DRB1*11 in anti-MAG neuropathy was detected.