An ultrasound diagnosis apparatus that can generate and display 3D ultrasound image data of superior image quality in real time is provided. To achieve a high volume rate for acquiring 3D ultrasound image data, the ultrasound diagnosis apparatus performs 3D scans on a 3D region of an object while sequentially shifting a transmission/reception group that is comprised of each of the transmitting acoustic fields and more than five parallel simultaneous reception beam directions corresponded to each of the transmitting acoustic fields at a prescribed angular distance Δξ0 along the θ (azimuth) direction and the φ (elevation) direction.
