Structure for electrolyte measurement, flow-type ion-selective electrode using same, and electrolyte measurement device

The present invention provides an electrolyte measurement structure capable of reducing the influence of retention of a sample liquid on a measured value, performing accurate measurement, and smoothly performing an exchange operation of an ion-selective electrode. An electrolyte measurement structure is provided with a main body (401) which can be connected to another electrolyte measurement structure via a sealing material and which is provided with a through flow path (401a), a fixing structure (404) which has a fixing recess for fixing the sealing material (405) to the main body (401), and the sealing material (405). The sealing material (405) is an elastic body in which a sheet region and a protruding region fixed to the fixed structure are integrally molded, and the sealing material (405) is in a state in which the sealing material (405) is fixed to the fixed structure (404) and in a state in which the sealing material (405) is not in contact with another electrolyte measurement structure. The amount of