An ultrasonic probe includes: a transducer unit including a plurality of transducers transmitting/receiving an ultrasonic wave a transducer holding frame an acoustic window formed from a material having an ultrasonic transmission property, the acoustic window forming a first space including the transducer unit in an inner part a driving unit a driving unit holding frame which holds the driving unit and forms a second space including an output shaft of the driving unit in an inner part a pipe including a hollow portion with which connects the first space and the second space a force transmission unit and a housing including, in an inner part, the transducer unit, the transducer holding frame, the acoustic window, the driving unit, the driving unit holding frame, the pipe, and the force transmission unit, wherein the first space, the hollow portion of the pipe, and the second space are filled with coupling liquid.
