PROBLEM TO BE SOLVED: To provide an ultrasound diagnostic device capable of obtaining a transmission condition before revision by referring to a transmission condition after the revision.SOLUTION: An ultrasound diagnostic device including a vibrator for outputting an ultrasound beam and a drive unit for driving the vibrator by supplying a pulse to the vibrator on the basis of a predetermined output condition includes: first calculation means 131 second calculation means 132 and display means 5. The first calculation means 131 calculates a first output condition for the case of outputting the ultrasound beam, on the basis of a first index with regard to biological safety affected by the ultrasound beam. The second calculation means 132 refers to the first output condition, and calculates a second output condition with regard to a second index before the first index is revised, on the basis of a predetermined expression. The display means 5 displays the first and second output conditions so that they can be compared.
