Abstract: Objective To evaluate the accuracies of pulse wave and oscillometric electronic sphygmomanometers for blood pressure measurements in obese people. Methods Community-based men and women,aged≥18years whose body mass index（BMI）were 30kg/m~2 or more were recruited in Laiwu city,Shandong province in September2015. Four way pipe was used to link desktop mercury sphygmomanometer,electronic sphygmomanometer to subjects simultaneously. Blood pressure value recorded by desktop mercury sphygmomanometer was considered as golden standard. Intra-class correlation coefficient（ICC）, Bland-Altman method and allowable total error（ATE）/limits for erroneous results zones（LER）zones were used for evaluating accuracy of two electronic sphygmomanometers compared to mercuries sphygmomanometer. Results A total of 118 subjects were enrolled. The ICC of pulse wave electronic sphygmomanometer-desktop mercury sphygmomanometer were 0.99（95% CI0.99-1.00）for systolic blood pressures and 0.96（95% CI0.90-0.98）for diastolic blood pressures. The ICC of oscillometric electronic sphygmomanometer-desktop mercury sphygmomanometer were 0.98（95% CI 0.97-0.99）for systolic blood pressures and 0.90（95% CI0.44-0.96）for diastolic blood pressures. Bland-Altman test showed that the mean systolic blood pressure difference closed to zero reference line,while the mean diastolic blood pressure difference was below the zero-reference line,especially in oscillometric sphygmomanometer（-5.7vs-2.6mmHg,P＜0.05）.ATE/LER zones analysis showed that more than 95% values for systolic blood pressures in two sphygmomanometers fell within the ATE zones. For diastolic blood pressure values in pulse wave electronic hygmomanometer,4.2% and 0% measured values fell within the intermediate zones and LER zones respectively while the corresponding proportions in oscillometric electronic sphygmomanometer were 19.5% and 0.8%. Conclusion This study indicated that both pulse wave and oscillometric electronic sphygmomanometers have good accuracies in systolic blood pressure measurement,however,underestimated diastolic blood pressure,particularly in oscillometric electronic sphygmomanometer in obese people.