Purpose: This study was conducted to investigate the effect of distraction manipulation on the pain and. intervertebral disc angle in patients with herniated intervertebral lumbar discs. Methods: 30 patients who visited to receive the treatments of the physical therapy in W pain clinic in Daejeon. All subjects had been treated with flexion-distraction manipulation for 30 minutes per day and three times a week during 12 weeks period from June 10 to 19 August 2006. They were randomly divided into two groups: lumbar 4 and lumbar 5 group. Results: Pain of L4 and L5 group was significantly reduced after than before treatment(p<0.05). The intervertebral lumbar disc angle was significantly improved after than before treatment(p<0.05). Conclusion: These results indicated that distraction manipulation has a effectiveness in patients with herniated lumbar disc.