REFERENCE ELECTRODE

본 발명은, 비교 전극의 액락부에 있어서, 측정액에 기포가 섞여 있는 경우라도, 내부액과 측정액과의 도통을 유지하고, 측정액의 전위측정을 행하는 것이며, 제2 내부액(15)이 수용되는 제2 내부액실(36)과, 상기 제2 내부액(15)과 측정 대상인 측정액(9)이 접촉하도록 제2 내부액실(36)에 배치된 액락부(40)를 구비한 제2 바디(42)와, 제2 내부액실(36) 내에 배치된 내부극(R)을 구비하며, 액락부(40)가, 다공질 또는 섬유상의 부재로 형성되는 도통용 부재(41)와, 도통용 부재(41)에 인접하는 개구(45)로 형성된 것이다. A reference electrode according to the present invention maintains continuity between an internal solution and measurement sample and measures the electrical potential of the measurement sample even if the measurement sample in a liquid junction of the reference electrode has air bubbles mixed therein. This reference electrode is provided with: a second body provided with a second internal solution chamber in which a second internal solution is housed and a liquid junction portion disposed in the second internal solution chamber such that the second internal solution and measurement sample that is to be measured come into contact; and an internal electrode disposed inside the second internal solution. The liquid junction portion is formed from a conduction component formed from a porous or fibrous component and an aperture adjacent to the conduction component.