The invention relates to a sphygmomanometer, which comprises a cuff (1) with a gasbag, a inflation and deflation device (2), a pressure sensor (3), a digital display unit (4), a stethoscope head (5), a microphone (6), an audio processing circuit (7), a speaker (8) and a power supply, wherein, the inflation and deflation device (2) is communicated with the gasbag of the cuff, the pressure sensor (3) is used for detecting the pressure of the gasbag, the digital display unit (4) is connected with the pressure sensor (3) and used for displaying pressure value, the stethoscope head (5) is used for getting pulse sound, the microphone (6) is arranged in an sound induction tube of the stethoscope head (5) and used for receiving the pulse sounds get by the stethoscope head (5), the audio processing circuit (7) is connected with the microphone (6) and receives and linearly processes outputted audio signal from the microphone (6), the speaker (8) which is connected with the audio processing circuit (7) and is used for broadcasting the processed audio signal by the audio processing circuit (7), the power supply supplies power to the sphygmomanometer. The sphygmomanometer has the advantages of accurate and reliable measuring result, convenient hear korotkoff sounds and environmental protection without needing to use mercury.