The utility model discloses an ultrasonic probe. The ultrasonic probe comprises a shell, a sound head, a driving device and a pressure sensor, wherein the sound head is installed on the shell, and thedriving device is connected with the sound head and used for driving the sound head to vibrate at low frequency. The pressure sensor is used for detecting the pressure of the contact surface of the sound head and a measured medium, and the probe begins to detect only when the pressure reaches a set value, so that the consistency of the pressure during each measurement is ensured, and the detection precision is improved.