Relates to blood sensor in the blood test apparatus, in particular, the invention relates to a blood sensor to be easily attached and detached to and from the blood test apparatus. Blood sensor of the present invention, the supply passage is supplied with blood, and is detachably attached to the blood test apparatus having a plurality of connectors provided in an area including the detection section detecting portion provided in the supply channel plural detection electrodes were further comprising a plurality of connecting electrodes which are electrically connected to the detection electrodes of the plurality, and a reference electrode as a reference for identifying each of the connection electrodes of the further plurality. Each of the plurality of connecting electrodes of the blood sensor attached at a predetermined position of the blood test apparatus, and the reference electrode, each of said plurality of connectors are connected.本発明は、血液検査装置における血液センサに関し、具体的には、血液検査装置に容易に着脱される血液センサに関する。本発明の血液センサは、複数のコネクタを有する血液検査装置に着脱可能に装着され、かつ血液を供給される供給路;前記供給路に設けられた検出部;前記検出部を含む領域に設けられた複数の検出電極;前記複数の検出電極と電気的に接続している複数の接続電極を備え、さらに前記複数の接続電極のそれぞれを識別するための基準となる基準電極を備える。前記血液検査装置の所定位置に装着された前記血液センサの複数の接続電極のそれぞれ、および基準電極には、前記複数のコネクタのそれぞれが接続する。
