Abstract: A combined-blade open flow path device is a fluid flow path device where flow paths are adjacent to each other. The combined-blade open flow path device comprises a substrate configured to constitute a bottom portion of the flow paths; and blades erected on a surface of the substrate, the blades being configured to constitute side walls of the flow paths, wherein the blades are erected in groups, each of the groups extending from an upstream side to a downstream side in a flow direction of a fluid with a space between each of the blades in the flow direction of the fluid in each of the groups for making conduction of the fluid between the adjacent flow paths possible, and wherein one end of one of the flow paths is configured to be in contact with the fluid and is configured to make a flow of the fluid possible.

Abstract: A combined-blade-type open flow path device being a fluid flow path device where a plurality of flow paths are adjacent to each other, the combined-blade-type open flow path device comprising: a substrate configured to constitute a bottom portion of the flow paths; and a plurality of blades erected on a surface of the substrate, the plurality of blades configured to constitute side walls of the flow paths, wherein the plurality of blades are erected in a plurality of numbers at a space in a direction from an upstream side to a downstream side of a flow of the fluid, and conduction of the fluid between the flow paths adjacent at the space is made possible, and wherein the flow of the fluid is made possible by one end of the flow path being in contact with the fluid.