Inclusion Criteria:  Age: Participants will be both males and females, 18-65 years of age included. diagnosis of OCD all the patients must have failed to respond to at least two different pharmacological treatment used for at least 6 weeks Affiliation to a social security system (recipient or assignee), Signed written inform consent form  Exclusion Criteria:  The exclusion criteria are a diagnosis of another psychiatric disorder (except for anxious disorders), a diagnosis of a significant active medical illness, pregnancy or other neurological illness In accordance with the safety criteria for rTMS, patients with a history of seizure or bearing pacemakers, mobile metal implants, implanted medical pumps, or metal clips placed inside the skull will also be excluded The patients won't be allowed to change their medication during the trial. The treatment must be stable at least 3 week before day 0. Female subject who is pregnant, or of child-bearing age, sexually active and not using reliable contraception or who is nursing, Patient under curators Patient hospitalized under duress Patient unable to give his or hers informed consent