Disclosed is a method for obtaining differentiated cells and/or differentiated cell products, including the steps of: introducing undifferentiated cells into a perfused organ or living tissue; subjecting the undifferentiated cells to perfusion culture together with the organ or living tissue so as to allow the undifferentiated cells to differentiate; collecting a perfusion culture solution that contains the resulting differentiated cells and/or differentiated cell products; and obtaining the differentiated cells and/or differentiated cell products contained in the collected perfusion culture solution.
