To provide a cell culture chamber capable of reproducing a cell function in vivo, and a method of producing the same. The microscope uses a detector that is preferably significantly larger than the resolution of the microscope and is positioned in the real image plane, which provides improved contrast, particularly for light elements. Subsequently, the friction stir welding is performed along each of the first abutment portion and the second abutment portion by using a probe which is rotated at a high speed. These modules can be concatenated, in other words, whatever number of modules may be desired or may be necessary depending upon their intended use, can be connected to each other one after the other.