This study recruited thirty three alcoholics with diagnosis confirmed by Diagnostic and Statistical Manual of Mental Disorders in its Fourth Edition (DSM-IV) who present themselves voluntarily for treatment of Alcohol Dependence Syndrome in the outpatient public service at University Hospital Cassiano Antonio de Moraes from Health Sciences Center from Federal University of Espirito Santo (PAA / HUCAM / CCS / UFES), which were clinically stable and not requiring hospitalization, with significant history of consumption of at least 35 weekly doses of alcohol on average last year, and an active intake of at least 35 weekly doses of alcohol in the last 90 days before starting the study, and yet, being in a minimum of seven days of abstinence until beginning of the study protocol. They signed a consent form and were distributed randomly in two groups (sham and tDCS groups). Registrations of visual-cued (neutral or alcohol-related images) event-related potential (ERPs)were done before and after repetitive bilateral (left cathodal/right anodal) transcranial Direct Current Stimulation (tDCS, 5 x 7 cm2, 2 mA, double application - 13 min duration with 20 min interval in between)over the dorsolateral prefrontal cortex or sham procedure. tDCS or sham tDCS were applied once a day for 5 consecutive days. Cognitive tests (frontal assessment battery - FAB, mini-mental status examination - MMSE, verbal n-back task, visuospatial n-back task, go/no-go task) were done at the beginning of the session 1 and session 6. They were weekly followed up for 4 additional weeks and monthly over the following 5 months. Treatment of acute withdrawal followed the routine in the outpatient service (diazepam, vitamins and general support). They were examined weekly at the outpatient service for 4 weeks after the end of the protocol.