An electrolyte analyzing device which is configured to measure a liquid junction potential between a sample solution obtained by diluting a sample with a dilute solution and a reference electrode solution, or a liquid junction potential between an internal standard solution and the reference electrode solution, the electrolyte analyzing device comprising: a reagent container setting unit that is configured to set a dilute solution bottle which houses the dilute solution, an internal standard solution bottle which houses the internal standard solution, and a reference electrode solution bottle which houses the reference electrode solution, wherein the reagent container setting unit includes a partition wall between the reference electrode solution bottle and the combination of the dilute solution bottle and the internal standard solution bottle, when the dilute solution bottle, the internal standard solution bottle, and the reference electrode solution bottle are set, wherein the reagent container setting unit includes: a substrate on which, in use, the dilute solution bottle, the internal standard solution bottle, and the reference electrode solution bottle are set; a first suction nozzle that is configured to suction the dilute solution from the dilute solution bottle; a second suction nozzle that is configured to suction the internal standard solution from the internal standard solution bottle; a third suction nozzle that is configured to suction the reference electrode solution from the reference electrode solution bottle; a nozzle support part that is coupled to the first nozzle to the third nozzle and is movable between a reagent container replacement position and a reagent suction position; and a reagent container stand that houses the nozzle support part in a drawable manner, wherein when the dilute solution bottle, the internal standard solution bottle, and the reference electrode solution bottle are set on the substrate, the reagent container stand is interposed between a reagent suction port of the dilute solution bottle or a reagent suction port of the internal standard solution bottle, and a reagent suction port of the reference electrode solution bottle. a reagent container setting unit that is configured to set a dilute solution bottle which houses the dilute solution, an internal standard solution bottle which houses the internal standard solution, and a reference electrode solution bottle which houses the reference electrode solution, wherein the reagent container setting unit includes a partition wall between the reference electrode solution bottle and the combination of the dilute solution bottle and the internal standard solution bottle, when the dilute solution bottle, the internal standard solution bottle, and the reference electrode solution bottle are set, wherein the reagent container setting unit includes: a substrate on which, in use, the dilute solution bottle, the internal standard solution bottle, and the reference electrode solution bottle are set; a first suction nozzle that is configured to suction the dilute solution from the dilute solution bottle; a substrate on which, in use, the dilute solution bottle, the internal standard solution bottle, and the reference electrode solution bottle are set; a first suction nozzle that is configured to suction the dilute solution from the dilute solution bottle; a second suction nozzle that is configured to suction the internal standard solution from the internal standard solution bottle; a third suction nozzle that is configured to suction the reference electrode solution from the reference electrode solution bottle; a nozzle support part that is coupled to the first nozzle to the third nozzle and is movable between a reagent container replacement position and a reagent suction position; and a reagent container stand that houses the nozzle support part in a drawable manner, wherein when the dilute solution bottle, the internal standard solution bottle, and the reference electrode solution bottle are set on the substrate, the reagent container stand is interposed between a reagent suction port of the dilute solution bottle or a reagent suction port of the internal standard solution bottle, and a reagent suction port of the reference electrode solution bottle.