An ultrasound diagnostic apparatus that can combine image data and has a first image mode and a second image mode, includes: a hardware processor that sets a scan parameter of an image of a first image mode according to restriction information of the scan parameter, when the second image mode is turned on and generates control information； a transmitter that generates a drive signal and inputs the drive signal to an ultrasound probe that transmits transmission ultrasound to a test object and receives reflected ultrasound； a receiver that generates a reception signal of the images in the first and second image modes from an electric signal generated in the ultrasound probe； a first-image-mode image generator that generates first-image-mode image data； a second-image-mode image generator that generates second-image-mode image data； and a combiner that generates combined image data by combining the generated first-image-mode image data and second-image-mode image data.
