To provide an ultrasonic imaging apparatus and an ultrasound image display method capable of preventing a three-dimensional ultrasound image from flickering due to an inappropriate ROI being calculated and improving the image quality of the ultrasound image. An ultrasonic imaging apparatus of the present invention is provided with: an ROI calculating section configured to calculate an ROI from ultrasound image data； a judgment section configured to judge whether the calculation of the ROI is successful or not on the basis of at least one of a position with a predetermined brightness difference and the number of positions with the brightness difference in the ultrasound image data； and a compensation section configured to compensate a failed ultrasound image based on the ROI judged to be failed by the judgment section with a successful ultrasound image based on the ROI judged to be successful by the judgment section.
