Ultrasound diagnostic technique for setting virtual origins of acoustic lines for trapezoidal scanning

An ultrasound diagnostic apparatus transmits ultrasound toward a subject by driving an ultrasound probe in which multiple transducers are arranged in an array, receives a reception signal that is based on waves reflected within the subject from the ultrasound probe, and generates an ultrasound image. The ultrasound diagnostic apparatus includes: a scan control section that sets scan conditions so that trapezoidal scanning is performed by the ultrasound probe; and a transmission section that controls driving of the ultrasound probe based on the scan conditions. The scan control section sets the scan conditions so that the inter-acoustic line angles in or around the center of the ultrasound probe are smaller than the inter-acoustic line angles near the edges when viewed along the scan direction.