An ultrasound diagnostic apparatus is connectable with an ultrasound probe having a c-MUT element or a piezoelectric ultrasound transducer, and includes a DC bias output portion, a transmission signal output portion, an operation portion, a control portion, and a display portion. The control portion controls the DC bias output portion and the transmission signal output portion so as to output an ultrasound transmission signal after applying the bias voltage when an instruction signal instructing the start of transmission is inputted from the operation portion, and so as to stop application of the bias voltage after stopping output of the ultrasound transmission signal when an instruction signal that instructs stopping of transmission is inputted from the operation portion. The control portion causes a connection state showing which one of the c-MUT element and the capacitive micro-machined ultrasonic transducer is connected to be displayed on the display portion.
