An ultrasound diagnostic apparatus includes: an ultrasound probe； an imaging unit that transmits and receives an ultrasound beam to and from a subject using the ultrasound probe and converts a received signal output from the ultrasound probe into an image to generate an ultrasound image of the subject for each frame； a part determination unit that determines an imaging part of the subject using the ultrasound image generated by the imaging unit； a probe state determination unit that determines whether the ultrasound probe is in an aerial emission state or a contact state with the subject； and an apparatus control unit that controls the part determination unit such that part determination is not performed in a case in which the probe state determination unit determines that the ultrasound probe is in the aerial emission state and the part determination is performed in a case in which the probe state determination unit determines that the ultrasound probe has been changed from the aerial emission state to the contact state with the subject.
