The present invention is a hepatocyte culture device enhancing accumulation and excretion of a hepatic metabolite in and into a bile canaliculus-like structure, the device including: a first cell culture containing a plurality of hepatocytes; a portable culture vessel in which the bile canaliculus-like structure can be established between the hepatocytes in the first cell culture, and that has, on an outer surface of the culture vessel, a membrane through which a physiologically active substance can pass; and a second cell culture capable of improving excretion activity of a hepatic metabolite in the first cell culture, in which the first cell culture cultured in the portable culture vessel is disposed on the second cell culture to be co-cultured.

To provide a cell storage method to store living cells while maintaining the functions of the living cells. An aspect of the cell storage method is a method to store living cells (40) by using a cell culture chamber (20) including a plurality of the microchambers (11), the method including: culturing the living cells by being adhered to the surfaces of a plurality of micro spaces; and after the culturing, pouring the culture medium (50) into the cell culture chamber (20) so as to cover the plurality of microchambers (11), and storing the living cells. The living cells are adhered to a cell culture chamber of an appropriate size and cultured to form a three-dimensional structure. This enables maintaining the three-dimensional structure of the living cells and storage of the living cells while maintaining the functions thereof.

Portable biotechnology Kit which object is providing all the necessary material for the performance of laboratory practical lessons in an easy manner and at a low cost which basic structure is a group box containing all the material necessary for carrying out a microbial or molecular biotechnology practical lesson and wherein said group box consist of a flat sheet of cardboard, with folding lines that allow it to be turned into a closed container in which to transport all the material necessary for the practical but which once open, remains unfolded in a flat surface which can be used as a work surface.

An incubator capable of observing an observed specimen in a dish 220 by a microscope while culturing the specimen, wherein light is radiated from a capacitor(C), passed through a hole 273 in a top plate 271, a hole 275a in a upper side plate 275 and a hole 277a in a lower side plate 277, and let into an objective lens (T), and the specimen put in the dish 220 is observed by the microscope, whereby the change of the specimen with elapse of time can be continuously observed or recorded on a videotape while culturing the observed specimen in the dish 220.