 It is consisted with two sub research. First,clinical research to know the effect of acupuncture for chronic low back pain will be processed with acclate, randomized, patient, outcome-assessor masking. 130 subjects would be collected and devided into two groupsExperimental and placebo. Experimental group will undergo with real acupunture treatment twice a week, for 6 weeks and acupuncture spots would be selected for each person by clinical specialist. Placebo group will undergo with Park-sham needle and same 8 acupuncture spots would be used for all subjects also twice a week, for 6 weeks. The effect will be accessed by VAS, x-ray, ODI, SF-36, EQ-5D, BDI before and the last treatments. 