Objectives : The purpose of this report is to estimate Cox flexion distraction treatment by comparing the Improvement of Sciatica treated by Cox flexion distraction treatment with Common treatment. Methods : This study was carried out on 60 patients with Sciatica who were hospitalized in Dongguk University Gyeongju Oriental Hospital from February, 2008 to December, 2008. Group A of 30 patients were taken both common treatment and Cox flexion distraction treatment. And Group B of 30 patients were only taken common treatment. And at treatment conclusion day, we checked and compared VAS(Visual Analogue Scale)and ODI(Oswestry disability index) out of these two group. SPSS(Statistical Program for Social Science) for Windows was used for a statistical analysis and the independent T-test was performed to gauge the improvement of VAS(Visual Analogue Scale)and ODI(Oswestry disability index) out of these two group, in which case, value of P below 0.05 is considered as useful. Results and Conclusions : The results of the VAS(Visual Analogue Scale)and ODI(Oswestry disability index) of comparison analysis between two group at treatment conclusion day, show that the improvement of Sciatica in common treatment with Cox flexion distraction treatment Group is more effective than that in common treatment.