The waterproof property of a bodily fluid component measurement system is improved. A bodily fluid component measurement system according to this invention includes a sensor unit which is indwelled in the skin of a subject and connected to a bodily fluid in the subject to measure a predetermined bodily fluid component, and a transmission unit which is detachably attached to the sensor unit and transmits, to a display unit, a measurement signal obtained by the sensor unit or a calculation result calculated as a concentration of the bodily fluid component in a bodily fluid of the same type as or different type from the bodily fluid based on the measurement signal. The sensor unit measures the bodily fluid component and transmits the measurement signal to the transmission unit by being activated by electromagnetic induction caused by an electromagnetic field generated by the transmission unit.