An ultrasonic diagnostic apparatus according to an embodiment includes a signal processing unit, an indicator calculating unit, a storage unit and a controller. The signal processing unit generates, based on a reflection wave signal of an ultrasonic wave that is transmitted into a subject, strain information about a strain of a tissue that is pressured and released in the subject in chronological order. The indicator calculating unit calculates an indicator of a state of pressure and release to the tissue at generation of the strain information. The storage unit stores a time phase at generation of the strain information and the indicator at generation of the strain information in an associated manner. The controller extracts a candidate time phase being a time phase of a candidate based on the indicator associated with each of the time phase.