tDCS Stimulation to Treat Patients With Severe and Resistant Obsessive Compulsive Disorder-Pilot Study

Patients must present all of the following criteria in order to be eligible: Inclusion Criteria: * Meets criteria for obsessive compulsive disorder according to DSM-IV with a "good insight" (BABS), * Age: Participants will be both males and females, 18-70 years of age included. * No current depressive and suicidal risks, * No epileptic pathology, * Chronic evolution ( Total Y-BOCS\>20 ), * Obsessive compulsive disorder resistant to pharmacology treatment, at least 2 antidepressants (type IRS) or cognitive and comportment therapy since at least one year, * Stability treatment (antidepressants) for more than 12 weeks without significant improvement, * Affiliation to a social security system (recipient or assignee), * Signed written inform consent form. Exclusion Criteria: * Female subject who is pregnant, or of child-bearing age, sexually active and not using reliable contraception or who is nursing, * Patient under curators * Meets another diagnosis of axe 1 of DSM-IV, * Current depressive or suicidal risks, * Patient with a benzodiazepine treatment, * Patient with any form of metal in the cranium, a pacemaker, skull defects, or skin lesions to the scalp (cuts, abrasions, rash) , * Epileptic patient, * Patient with a medical history of cranial trauma, * Patient unable to give his or hers informed consent.