PURPOSE: To obtain a method for manufacturing gel-shaped member for an ion measurement electrode which can retain a wet state of a surface for a long time continuously and moderately regardless of temperature of an ambient air.

CONSTITUTION: A high moisture-retention water-containing jelly with an acryl- family polymer as a main constituent is dissolved into a specific water solution which consists of an internal liquid, a buffer solution, a pH-adjusting liquid, or a combination of them and at the same time a gelling agent such as agar-agar or gelatin is added for gelling and forming into a specific shape.