The aim of this study is to investigate the effect of repetitive TMS in reduction of depressive symptoms in patients with bipolar disorder. In a randomized, single blind clinical trials, 30 patients with bipolar disorder in Atieh Neuroscience center will be assigned to receive bilateral TMS and unilateral TMS, daily; for 20 sessions. The depressive and anxiety symptoms and quality of life will be assessed before the treatment (pre test) during the treatment (10th session), and after the treatment (post test). QEEG apply before and after rTMS in all subjects.

Inclusion Criteria:

1. Outpatients male and female with the range of 18-65 years of age
2. The diagnosis of Bipolar disorder according to DSM-IV-TR
3. Completion of consent form
4. Being under supervision of a psychiatrist,
5. Having BDI>14
6. Being able to adhere to treatment schedule,
7. Having stable symptoms as defined by not requiring a change in medication for at least 4 weeks .

Exclusion Criteria:

1. The history of rTMS treatment for any reason
2. Intracranial implant and other ferromagnetic materials close to the head
3. Cardiac pacemaker
4. Drug pumps
5. The risk of seizure with any reasons
6. High intracranial pressure
7. The history of epilepsy or seizure in the first relatives
8. Any metal in head
9. Pregnancy
10. Breastfeeding
11. High risk of suicide 12 Having personality disorder in axis II