A pH measuring device is disclosed. One aspect includes a body portion including a hollow portion therein and a through-portion formed in a first region so that the hollow portion communicates with the outside； an electrode unit including a reference electrode and a sensing electrode including different materials and configured to measure the pH in a living body by allowing a first end to be located in the hollow portion and a second end opposite to the first end to be exposed to the outside of the body portion through the through-portion； and a wireless communication unit configured to transmit a pH measurement value sensed by the electrode unit to the outside.
