The utility model discloses a bluetooth headset with blood oxygen monitor function, the inside shaping earphone holding chamber of its earphone casing, the earphone casing is including going into, go out ear's branch, pleasant partial earphone holding intracavity setting -in earphone control scheme board, dress bluetooth module is joined in marriage to earphone control scheme board, go out the earphone holding intracavity setting -in microprocessor that the ear divides, a digital/analog converter, the LED probe, the LED probe is including red LED emitting diode, infrared ray LED emitting diode, it installs the fly leaf in the inboard of tip down to go out ear's branch, the spring was installed to the articulated just position between them articulated of tip under tip and play ear divided under the fly leaf, the inside setting -in light frequency converter of fly leaf. Through the structure design, the utility model discloses have bluetooth headset, blood oxygen monitor function simultaneously concurrently, and blood oxygen measured data can send directly on the cell -phone, additionally, the utility model discloses can not only the utilization with high efficiency current bluetooth headset's part, save the cost, is characterized in also that the structure is light and handy, convenient to use.