ELECTROLYTE MEASURING STRUCTURE, FLOW-TYPE ION-SELECTIVE ELECTRODE USING THE SAME, AND ELECTROLYTE MEASURING DEVICE

Provided is an electrolyte measuring structure that can reduce the influence of the retention of a sample solution on a measured value, perform accurate measurement, and smoothly perform replacement work of an ion-selective electrode.The electrolyte measuring structure that can be connected to another electrolyte measuring structure via a sealing material, includes a main body 401 having a flow path 401a therethrough, a fixing structure 404 having a fixing recess for fixing a 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 protrusion region to be fixed to the fixing structure are integrally molded. In a state where the sealing material 405 is fixed to the fixing structure 404 and is not in contact with the other electrolyte measuring structure, a protrusion amount of a first portion that protrudes the most on a front surface of the sheet region is larger than a protrusion amount of a second portion that protrudes the most on a front surface of the protrusion region.