According to one embodiment, an ultrasound diagnostic apparatus includes an ultrasound probe and processing circuitry. The ultrasound probe is adapted to be applied on a surface of a subject. The ultrasound probe performs ultrasound scanning for a scan region in the subject. The processing circuitry analyzes, among a result of the ultrasound scanning, a part corresponding to a central portion of the scan region to calculate a distance between a blood vessel in the central portion and the surface. The processing circuitry causes a display to display the distance, a value based on the distance, or both the distance and the value.
