An ultrasonic probe and an ultrasonic imaging system including the ultrasonic probe are provided. The ultrasonic probe comprises a probe body, an elastic liner, an adjusting assembly and a fixing member. The ultrasonic probe can control an elastic adjustment base to squeeze or loosen the elastic liner by tightening or loosening an adjusting rotary knob, and thereby the insertion depth of the probe body in the elastic liner can be adjusted by tightening or loosening the probe body. The angle of the ultrasonic waves and the pressurization depth of the probe body of the ultrasonic probe can be adjusted, and the ultrasonic probe can be secured to a target object for a long time for continuous ultrasonic imaging. Therefore, the ultrasonic probe can be widely applied to a clinical occasion where long-time continuous ultrasonic monitoring is required.
