Substrate, the structure, a method of manufacturing a structure, selection method for cells, a method for manufacturing cells, and methods of producing secretions

In one embodiment, the structure provides a screening method and the like of the production method or cell of the structure. In one embodiment, the structure of the present invention (1) includes a first substrate (10), said first second substrate disposed to face the one side of the substrate (10) and (20) a structure comprising said first substrate (10) is open on the other side of the first substrate has a plurality of recesses (11) having a catchable size cells 1 unit, the At least a portion in the recess (11), the one communicating with said the side other side, has a communication hole (12) which secretions secreted from the cells has a size capable of being moved, the first second substrate (20), the secretions may comprise a storage unit (13) for storing and moving the communication hole (12), said storage unit (13), corresponding to the recess (11) It can be.