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EIS (electrical impedance scanning) is a new technique used in the diagnosis of breast cancer. The impedance characteristics of the breast tissue are the fundamentals of the technique. In our experiment the four-electrode measurement was facilitated by means of the model 1255B impedance analyzer, which was used to measure the multi-frequency resistivities of Chinese women's breast carcinomas and their surrounding tissuwa in vitro. From the data obtained, it can be seen that there existed significant differences in resistivity between the breast carcinoma and its surrounding tissues. The resistivity of the fatty tissue was the highest among the measured samples, then came the resistivity of the breast carcinoma and that of the gland tissues. Pathological analysis and interpretation were followed. Some features of EIS imaging for Chinese women which are different from those of the Western women can be illustrated by the measured data.