PROBLEM TO BE SOLVED: To provide a biological component measuring apparatus that accurately and quickly measures a biological component.SOLUTION: This biological component measuring apparatus includes: a calibration solution storage tank for storing calibration solution that includes the same component as the biological component to be measured at a known concentration a probe that includes an infiltration part for infiltrating the biological component to be measured from the outside to the inside, and that stores the calibration solution a sensor for measuring the measuring object contained in a solution mixture of the calibration solution that has been supplied from the calibration solution storage tank into the probe, and the measuring object that has infiltrated through the infiltration part a distribution switching means for selecting either a state (A) where the calibration solution is allowed to flow from the calibration solution storage tank to the probe and the solution mixture is allowed to flow from the probe to the sensor, or a state (B) where the calibration solution is allowed to flow from the calibration solution storage tank to the sensor without passing through the probe and the liquid in the probe is allowed to circulate and a liquid circulation means for circulating the liquid in the probe.COPYRIGHT: (C)2013,JPO&INPIT【課題】生体成分の測定を正確かつ迅速に行うことのできる生体成分測定装置の提供。【解決手段】測定対象である生体成分と同一の成分を既知の濃度で含有する校正液を貯留する校正液貯留槽と、外部から内部へと測定対象の生体成分を浸透させることのできる浸透部を備えるとともに、前記校正液を収容するプローブと、前記校正液貯留槽から前記プローブ内に供給された前記校正液と前記浸透部を通じて浸透して来た測定対象との混合液に含まれる測定対象を測定するセンサと、前記校正液貯留槽から前記プローブへと前記校正液を流通可能にするとともに、前記プローブから前記センサへと前記混合液を流通可能にする状態(A)と、前記プローブを経由することなく前記校正液貯留槽から前記センサへと前記校正液を流通可能にするとともに、前記プローブ内の液を循環可能にする状態(B)とのいずれかの状態に切り替える流通切替手段と、前記プローブ内の液を循環させる液循環手段とを備えて成る生体成分測定装置。【選択図】図1