Cell culture device and cell culture method

A cell culture device comprising:

• a culture container which has a first inflow port and a first outflow port and is used for culturing cells;
• a first flow path which connects the first outflow port to the first inflow port;
• a first storage container which is a storage container, which is provided within the first flow path and used for storing cells cultured in the culture container, the first storage container having a second inflow port which is connected to the first outflow port and a second outflow port which is connected to the first inflow port;
• a second flow path connecting a first region within the first flow path which is positioned between the second outflow port and the first inflow port, and a second region within the first flow path which is positioned between the second inflow port and the first outflow port;
• a division processing portion which is provided within the second flow path, performs a division process of dividing a cell aggregation, which is an aggregation of cells cultured in the culture container and flows in from the first flow path via the first region, and allows the cells subjected to the division process to flow out into the first flow path via the second region;
• and
• a medium supply portion which supplies a medium to the inside of the first flow path.