A pathologic tissue image analyzing apparatus , comprising image analyzing main means for conducting an analysis of a biology tissue image inputted from outside, extracting ducts contained within a tissue area of the biology tissue image based on a result of the analysis, and extracting a duct of a specific heterotypic degree from a duct area containing the ducts, wherein the image analyzing main means comprises: duct candidate area extracting module for detecting the duct area from the tissue area based on preset duct characteristic information that shows characteristics of the ducts within the tissue area; stroma candidate area extracting module for detecting a stroma area constituted with the stroma contained in the tissue area based on a preset texture characteristic within the tissue area; cell-nucleus detecting means for extracting cell-nucleuses contained in the detected duct area based on a preset pigment reference; and duct heterotypic degree calculating means for calculating the heterotypic degree of the duct based on a distribution state of the extracted cell-nucleuses with respect to a preset base area in the duct and outputting the heterotypic degree by output means , wherein the image analyzing main means further comprises a duct area detecting means including an area determining/extracting function which extracts the duct area by determining the stroma area and the duct area within the tissue area exclusively from each other; wherein the duct heterotypic degree calculating means includes a degeneration processing function which performs degeneration processing on each of the ducts contained in the extracted duct area and enhanced-displays shapes of the each of the ducts, and a duct shape detecting/judging function which detects the shapes of the ducts and judges whether the shapes of the each of the ducts is tubular or linear. duct candidate area extracting module for detecting the duct area from the tissue area based on preset duct characteristic information that shows characteristics of the ducts within the tissue area; stroma candidate area extracting module for detecting a stroma area constituted with the stroma contained in the tissue area based on a preset texture characteristic within the tissue area; cell-nucleus detecting means for extracting cell-nucleuses contained in the detected duct area based on a preset pigment reference; and duct heterotypic degree calculating means for calculating the heterotypic degree of the duct based on a distribution state of the extracted cell-nucleuses with respect to a preset base area in the duct and outputting the heterotypic degree by output means , wherein the image analyzing main means further comprises a duct area detecting means including an area determining/extracting function which extracts the duct area by determining the stroma area and the duct area within the tissue area exclusively from each other; wherein the duct heterotypic degree calculating means includes a degeneration processing function which performs degeneration processing on each of the ducts contained in the extracted duct area and enhanced-displays shapes of the each of the ducts, and a duct shape detecting/judging function which detects the shapes of the ducts and judges whether the shapes of the each of the ducts is tubular or linear. <EOS>