In an ultrasound diagnosis apparatus according to an embodiment, a scan switching unit switches between scanning methods so as to perform a first scanning method by which an ultrasound wave is transmitted and received to and from each of a plurality of observation sites alternately once each if the depth on the scanning line in at least one of the observation sites is smaller than a threshold value and so as to perform a second scanning method by which an ultrasound wave is transmitted and received to and from each of the plurality of observation sites alternately in such a manner that an ultrasound wave is transmitted and received to and from at least one of the plurality of observation sites multiple times if the depth on the scanning line in the at least one of the observation sites is equal to or larger than the threshold value.
