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To analyze soil properties of unsaturated zone, we applied electrical resistivity tomography(ERT) of highresolution image. From linear relationship with each soil texture between results of ERT and soil properties such aselectrical conductivity of pore water, water contents and ionic contents, we could be analyzed the result of ERT moreeffectively. Consequently, ERT can be useful for estimating soil properties between the two holes and evaluating indirectlypH and organic contents of soil.