According to one embodiment, an ultrasonic diagnostic apparatus includes an ultrasonic probe, position detector detecting a probe position, ultrasonic image generation circuitry generating an ultrasonic image, storage circuitry storing volume data and a designation position in association with each other, slice image generation circuitry generating a slice image to the designation position based on the data and the designation position, a display displaying at least one of first display displaying the slice image and the ultrasonic image and second display displaying contents different from contents in the first display, control circuitry controlling switching from the first display to the second display in response to movement of the probe position into a range to the designation position.
