FLOW PATH DEVICE AND TEST SYSTEM

A flow path device comprises a flow path 50 that includes a plurality of inlet portion side first flow paths 61 connected to an inlet portion 30; a plurality of inlet portion side second flow paths 62 connected to the plurality of respective inlet portion side first flow paths 61; and a plurality of reaction chamber portions 63 connected to the plurality of respective inlet portion side second flow paths 62, wherein the plurality of inlet portion side first flow paths 61 are configured such that when a positive pressure is applied to a liquid in the plurality of inlet portion side first flow paths 61, the amounts of the liquid flowing out from the plurality of inlet portion side first flow paths 61 to the respective reaction chamber portions 63 are substantially the same, wherein plurality of inlet portion side second flow paths 62 are configured such that when the magnitude of the positive pressure applied to the liquid in the plurality of inlet portion side first flow paths 61 is less than a threshold value, the outflow of the liquid from the inlet portion side first flow paths 61 to the reaction chamber portions 63 is restricted, and when the magnitude of the positive pressure is the threshold value or greater, the outflow of the liquid is allowed.