Objectives: The purpose of this study is to know that Beck Depression Inventory(BDI) score to effect on improvement degree of low back pain after oriental medical treatment. Methods: We analyzed charts of 33 inpatients who were treated in Ja-Seng Hospital of Oriental Medicine and Bu-Cheon Ja-seng Hospital of Oriental Medicine. Subject is divided into Group A(BDI<10) and Group B(BDI≥10). Numerical Rating Scale(NRS) and Oswestry Disability Index(ODI) were checked on admission, after 1 week, NES and OUT were rechecked o estimate the efficacy of treatments. Results: 1. In both groups, NES was significantly decreased(p<0.05). Analyzed result of the interaction between the two groups didn`t show significant difference(p=0.197). 2. In Group A, ODI was significantly decresed(p<0.05). In Group B, ODI wasn`t significantly decreased(p=0.058). The interaction analysis between the two groups didn`t show significant difference(p=0.173). 3. Analyzing patients with chronic back pain longer than 6 months by the presence of depression tendency and NRS, ODI decrease after 1 week of ambulation, while the NRS reduction showed relevancy by the depression tendency (p<0.05), the ODI reduction didn`t(p=0.272). Conclusions: 1. Although improvement of pain before and after the treatment and degree of functional recovery in high level BDI group was less than low-level BDI group, but it was stastically insignificant. 2. High BDI score of patients with chronic low back pain is the factor of disturbing pain improvement.