An ultrasound diagnostic apparatus comprises: an ultrasound probe that has a transducer array transmitting an ultrasonic beam toward a subject and receiving an ultrasonic echo by the subject to output reception signals; a diagnostic apparatus body that is connected to the ultrasound probe by wireless communication and generates an ultrasound image on the basis of the reception signal output from the transducer array; at least one power receiving terminal that is arranged at the ultrasound probe and electrically connected to respective parts in the ultrasound probe; and a power supply unit that is capable of being attached to an operator's body and is detachably connected to the power receiving terminal so as to perform power supply to the respective parts in the ultrasound probe.