Objective To study the effects of diverse area electrodes on electrical impedance tomography and select the best electrode suitable for electrical impedance tomography.Methods The diverse areas electrodes were used to perform electrical impedance tomography for human body.The data were statistical analyzed in order to choose the best electrode suitable for electrical impedance tomography in human body.Results The signal assessed by the electrode of 1.5 cm × 5 cm was stronger than that with other area electrodes and the standard deviation of the former signal was less than the others.Conclusion It demonstrates that the best areas of electrode based EIT is defined tentatively in this experiment.It makes an essential prerequisite for EIT system.