Abstract: An embedding cassette that is used as a container for performing a paraffin replacement treatment of a biological specimen and also used as a loading table of an embedding block in which the biological specimen subjected to the paraffin replacement treatment is embedded in an embedding material, the embedding cassette includes: a cassette body that is formed from a polyester resin and has an accommodation concave portion that accommodates the biological specimen and a flat printing surface; a thin-film layer that is formed on the printing surface from a resin having chemical resistance with respect to formic acid, formalin, ethanol, and xylene, that has a color different at least in lightness from a color of the cassette body; and an identification code that is displayed in the thin-film layer by cutting by irradiation with a laser beam.

Abstract: The invention is intended to achieve high-precision quality control by alleviating a burden of personnel by improving the operation efficiency and preventing erroneous storage of embedding cassettes in a container. A control unit controls a cassette carrying unit so as to take out a cassette of a predetermined kind from a cassette storage in a predetermined order and carry the same to a cassette printing unit, and carry a cassette on which data is printed to a base container set in a container holding unit.