Amis:ST25(Chonchu) and ST37(Sanggoho) are usually used acupoints to management several disease which induced to abnormal intestinal motility as diarrhea, constipation. Colonic transit time by radio opaque marker is able to study easily and useful method for evaluation of colonic motility. The aim of this study was to assess the effect on colonic transit time by manual acupuncture or electroacupuncture stimulation of ST25, ST37 in normal adult. Method: Colonic transit time, including Rt colon, Lt colon, rectosigmoid colon was measured by radio opaque marker in 11 normal adults. Colon transit time was measured before stimulation and after stimulation on ST25, ST37 by manual acupuncture and electroacupuncture. Each person was treated manual acupuncture or electroacupuncture stimulation for 3 days before colonic transit time measurement with 1 week interval. Result: Colon transit time before stimulation was measured $10.60{pm}12.11$, $3.92{pm}7.72$, $3.27{pm}6.37$, $3.41{pm}5.57$ hours total colon, Rt colon, Lt colon, rectosigmoid colon, respectively. Colon transit time after manual acupuncture is measured $10.48{pm}12.35$, $3.72{pm}7.52$, $3.37{pm}6.76$, $3.39{pm}5.84$ hours total colon, Rt colon, Lt colon, rectosigmoid colon, respectively. Colon transit time after electroacupuncture stimulation is measured $10.30{pm}13.21$, $3.92{pm}8.02$, $3.07{pm} $, $3.31{pm}5.49$ hours total colon, Rt colon, Lt colon, rectosigmoid colon, respectively. Significant change was observed Lt colon transit time after electroacupuncture as compared before acupuncture(P<0.05). Conclusion: Theses results suggest that manual acupuncture and electroacupuncture of ST25, ST37 in normal adults does not change colonic transit time.