Method: This descriptive study was performing on 101of clbp patients who suffer from clbp were referred to neurosurgery and
orthopaedic clinic. Information were collected through MMPI2 (for find personality traits) &Mc Gill pain questionnaires, Visual
analogue scale (VAS) and socio_ demographic characteristic questionnaires..The Mc gill pain questionnaires investigate four
aspects (sensory-discriminative aspect of pain, an affective aspect of pain, cognitive_ evaluative aspect of pain and miscellaneous
aspects of pain). And statistical analyses were performing with descriptive program and SPSS version 13 software.