▎ 摘　　要

NOVELTY - The sensor has a cobaltosic oxide reducing graphene oxide composite material arranged on an electrode surface of an electrochemical sensor unit. USE - High sensitivity lead ion detecting-type electrochemical sensor. ADVANTAGE - The sensor is simple to operate, and consumes less preparation cost. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) a high sensitivity lead ion detecting-type electrochemical sensor manufacturing method (2) a high sensitivity lead ion detecting-type electrochemical sensor utilizing method. DESCRIPTION OF DRAWING(S) - The drawing shows a photograph view of a high sensitivity lead ion detecting-type electrochemical sensor.