Objectives : The aim of this study is to investigate the effect of acupuncture stimulation on the relationship of change in magnetocardiography (MCG). Methods : For this purpose, 30 heart deficiency volunteers were acupunctured at Shinmun (HA7) and Naegwan (PC6) acupoint. Then, we measured and observed the change of frequency parameters in MCG. Results : In the mean frequency, during and after acupuncture treated groups of PC6 were decreased the activity of $f;_{mean-max}$ compared to the control group. In the median frequency, during the acupuncture treated group of PC6 was decreased the activity of $f;_{median-max}$ compared to the control group. Conclusion : These results suggested that acupuncture stimulation plays an important role to the activities of MCG