Object: Current study reports psychometrics characteristic of Beck Depression Inventory-II.

Materials & Method: Three hundreds fifty four recovered depressed patients were assessed to determine the severity of depression and also the effect of randomized clinical trail. These subjects were recruited though community advertisement and clinical practices settings of psychiatrists and psychotherapists. After obtaining interviews, to evaluate the history of the primary problems (Past Major Depressive Disorder) and other exclude, include consideration criteria Beck Depression Inventory –II and Brief Symptom Inventory (Depression scale) were conducted. This article report data related to Beck Depression Inventory.

Results: Results of the factor analysis, reliability and validity showed application of the Inventory in clinical setting.

Conclusion: Psychometric characteristics of Beck Depression Inventory –II, reflects a robust diagnostic and results in related to severity of depression before and after treatment for several times. Evidence of the Beck Depression Inventory – II factorial validity, showed the marvellousness of assessing any kind of such clinical trial. Particularity with considering the three factors of depression, it would be possible to determine the dimensions of such respective changes.