The embodiment of the invention discloses an ultrasonic probe. The ultrasonic probe comprises a substrate, a motor, a driving wheel, a driven wheel, a sound head, two ropes, and at least one elastic element, wherein the motor is fixedly connected to the substrate; the driving wheel is connected to the output end of the motor; the motor can drive the driving wheel to rotate; the driven wheel is rotatably connected to the substrate through a rotating shaft; the sound head is used for transmitting and receiving ultrasonic waves and is fixedly connected to the driven wheel; both ends of each rope are provided with connecting ends respectively, the connecting end at one end is connected with the driving wheel, and the connected end at the other end is connected with the driven wheel; and one end of the elastic element is connected with the connecting end of at least one end of each rope, and the other end of the elastic element is connected with the driving wheel or the driven wheel. In the ultrasonic probe, constant force is supplied to the ropes by using the elastic element connected to the ropes to make the ropes tightened and buffer impact in the work process. The ultrasonic probe has a simple structure and is convenient to install.