An ultrasound diagnostic apparatus comprising: an ultrasound probe which has ultrasound transducers capable of outputting reception signals from fundamental waves and harmonics an image producer which produces a B-mode image and an M-mode image from the reception signal output from the ultrasound transducers with reception of the fundamental waves, and produces a B-mode image from the reception signal output from the ultrasound transducers with reception of the harmonics and an actuation controller for the ultrasound probe which switches the ultrasound transducers at a predetermined timing between the output of the reception signal from the fundamental waves and the output of the reception signal from the harmonics.
