An ultrasound image diagnostic apparatus includes the following. An ultrasound probe outputs transmission ultrasound into a subject in response to reception of a pulsed signal and outputs a reception signal in response to reception of ultrasound reflected from the subject. A transmitter generates the pulsed signal and outputs the generated pulsed signal to the ultrasound probe. A receiver receives the reception signal from the ultrasound probe and generates sound-ray data. An image generator generates ultrasound image data from the sound-ray data. An input receiver receives target position information on a target position. A highlighted-area determiner determines a first highlighted area among multiple areas in a body mark based on the target position information. A display combiner combines the body mark including the first highlighted area with the generated ultrasound image data and displays the resulting image on a display unit.
