There is provided a canceration information providing method which can detect the possibility of cancer in the initial stage with high accuracy. The canceration information providing method for providing information pertaining to canceration of cells includes: acquiring measurement data including first data pertaining to size of a cell nucleus and second data pertaining to size of a cytoplasm for each cell contained in a measurement sample which includes cells collected from epithelial tissue; extracting the measurement data of cells to be analyzed, which are at least some of the cells located toward the basal membrane side of the cells existing in the surface layer in the epithelial tissue, from the measurement data of a plurality of cells in the measurement sample based on the first data and the second data acquired for each cell; and analyzing the extracted measurement data and outputting the information pertaining to the canceration of cells.