Abstract: Provided is a cell culture apparatus, an apparatus for long-term observation of cell culture, a method for long-term cell culture, and a method for long-term observation of cell culture, which are capable of continuously culturing and observing cells under uniform environmental conditions without aging of the cultured cells' physiological state, and also tracing the history of a cell. The cell culture apparatus comprises a cell culture substrate, a semipermeable membrane, and a culture solution supplier. The cell culture substrate has on a surface a narrow culture groove for holding and culturing cells and wide flow grooves for discarding the cells held and cultured in the culture groove. Both ends of the culture groove are connected to the flow grooves being larger in width and depth than the culture groove. The semipermeable membrane covers the culture groove and the flow grooves. Finally, the culture solution supplier continuously supplies culture solution.

Abstract: To provide a cell culture apparatus, an apparatus for long-term observation of cell culture, a method for long-term cell culture, and a method for long-term observation of cell culture, which are capable of continuously culturing and observing cells under a uniform environmental condition without variation in physiological state associated with aging of the cultured cells, and also tracing the history (genealogy) of a certain cell.