Objectives : The purpose of this study is to investigate the effect of electro-acupuncture treatment for whiplash injury patients caused by traffic accident. Methods : 58 patients were divided into two groups, experimental group and control group, of 29 patients each. Experimental group was treated with electro-acupuncture treatment and general acupuncture treatment twice per week for four weeks. Control group was treated with general acupuncture treatment twice per week for four weeks. We evaluated the treatment effect of each group with the visual analog scale(VAS) and neck disability index(NDI). Results : 1. In both two groups, VAS and NDI were decreased significantly in statistics as treatment went on. 2. From 1st medical examination day to 4th treated day and From 1st medical examination day to 8th treated day, there were significant reduction of the VAS in experimental group than control group. 3. From 1st medical examination day to 8th treated day, there were not significant reduction of the NDI in experimental group than control group. Conclusions : We suggest that cotreatment of electro-acupuncture treatment could be recommended as a useful therapy in the early stages whiplash injury patients.