Provided is an ultrasonic probe including: a housing； an ultrasonic module； at least one signal line； a support barrel which is supported by the housing, in which the at least one signal line is arranged and an outer surface of which has at least one ring electrode which electrically connects the at least one signal line to the ultrasonic module； and a rotation barrel which is rotatable around the support barrel in one direction and supports the ultrasonic module so as to maintain an electrical contact of the ultrasonic module to the at least one ring electrode.
