The principal study aims at evaluating the efficiency of rTMS maintenance sessions on the clinical effect of a rTMS cure in fibromyalgic subjects. This complementary study consists in the evaluation of the experimental sensitivity to mechanical pain (pressure application on the forearm) of subjects presenting fibromyalgia before and after rTMS treatment (21 days), and to put the results in relation to the clinical improvement and the psychometric evaluations (depression,fibromyalgia impact questionnaire, catastrophism).

• Inclusion Criteria:

presence of the criteria from the American College of Rheumatology (2010)for fibromyalgia diagnosis, painful state for more than six months, visual analogic scale evaluation > or = 5, age between 18 and 70, no modification in therapeutic treatment one month before and during the protocol presence of actual or prior antalgic chronic treatment : pregabalin, duloxetine, milnacipran, gabapentin, venlafaxine, laroxyl, grade 1 or 2 antalgic residence in Limoges or the periphery, or the ability to come to the hospital for the treatment

Exclusion Criteria:

presence of non stabilized psychiatric comorbidity (personality trouble, addiction, suicide attempt, non controlled affective trouble), active epilepsy, previous cerebral traumatism, or cerebral surgery, intra-cranial hyper tension, pacemaker, metallic pieces in the brain, cochlear ocular implant, or any metallic material contra indicating magnetic resonance imaging.

clozapine, bupropion, methadon, theophyllin, or other non chemical antalgic technic established during the previous month(kinesitherapy, relaxation, hypnosis...), pregnancy, or administrative and judiciary protection, absence of health insurance.

known latex allergy, peripheral neuropathy, nerve lesion or dermatosis at the upper extremities, muscular lesion or pathology at the upper members, use of illicit drugs 48 hours before experimental pain test, use of antalgic or analgesic drug aiming at a punctual treatment during the prior 24 hours.