The present invention relates to an oxygen saturation measuring apparatus, and more particularly to an apparatus for measuring oxygen saturation, comprising: an SpO2 sensor unit for measuring oxygen saturation in arterial blood of a patient by a non-invasive method An SpO2 measuring apparatus main body having an internal power supply unit for displaying an oxygen saturation derived from the SpO2 sensor unit And an extension cable having one end connected to the SpO2 sensor unit and the other end connected to the SpO2 measuring device body, wherein the connection cable is connected to the SpO2 sensor unit, And the SpO2 measurement module unit is installed and configured.According to the oxygen saturation measuring apparatus proposed in the present invention, the SpO2 measuring module unit, which is provided inside the existing SpO2 measuring apparatus body, is constituted by the SpO2 sensor unit, the SpO2 measuring apparatus main body, and the connecting cable, And the one end of the connection cable provided with the SpO2 measurement module is connected and connected to the SpO2 sensor portion to improve the effect of reducing the inflow distance of the noise due to the oxygen saturation measurement, Thereby improving the performance of the overall oxygen saturation measurement by reducing the noise influence of the sensor.According to the present invention, since the SpO2 measurement module implemented as a miniaturization module is installed in the connection cable head of the connection cable, space is saved in the development of the whole measurement device, and SpO2 Parameters can be easily added, the weight required for system development can be reduced, durability can be improved, and the cost savings compared to the existing system design cost can be improved.In addition, the present invention receives a signal from the SpO2 sensor unit, converts it into a digitized signal by the SpO2 measurement module installed on the connection cable, and transmits it to
