An ultrasound diagnostic apparatus has: a recommended posture angle generation unit that sets, as a recommended posture angle, a posture angle of an ultrasound probe in a case where the likelihood of an imaging part in an ultrasound image with respect to an examination part is maximized while the posture angle of a probe posture angle detection unit is being changed over a predetermined angle range including a basic posture angle of the ultrasound probe, which is set corresponding to the examination part, by bringing the ultrasound probe into contact with the body surface of a subject and tilting the ultrasound probe by an operator； and a recommended posture angle notification unit that notifies the operator of the recommended posture angle generated by the recommended posture angle generation unit.
