PROBLEM TO BE SOLVED: To provide a sensor substrate that can be disposed in a living body without inflicting pain on the living body, a reliable analysis element equipped with the sensor substrate, a glucose measuring device, and an insulin feeding device.SOLUTION: A detection part (a sensor substrate of the present invention) 300 is used by being guided by a needle part (an insertion needle) 121 inserted into a hole bored in a living body, and being inserted into the living body. The detection part 300 includes a first region 351 provided at its tip which includes an electrode layer (a detection electrode), a third region 353 which includes a wiring part and has a width smaller than a width of a slit 113 of the needle part (the insertion needle) 121, and a second region 352 provided between the first region 351 and the third region 353, which has a width gradually reduced from the width of the first region 351 to the same width as the width of the third region 353.SELECTED DRAWING: Figure 10COPYRIGHT: (C)2017,JPO&INPIT【課題】生体に痛みを与えることなく、生体中に配置し得るセンサー基板、ならびに、このセンサー基板を備える、信頼性に優れた分析素子、グルコース測定装置およびインスリン供給装置を提供すること。【解決手段】検出部(本発明のセンサー基板)300は、生体内に穿孔されて挿入される針部(挿入針)121に導かれて、生体内に挿入して用いられるものである。この検出部300は、その先端部に設けられて、電極層(検出電極)を含む第1の領域351と、配線部を含み、針部(挿入針)121のスリット113の幅よりも小さい幅を有する第3の領域353と、第1の領域351と第3の領域353との間に設けられ、第1の領域351の幅から漸減して第3の領域353の幅と同じ幅を有する第2の領域352とを備える。【選択図】図10
