According to one embodiment, an ultrasonic diagnostic apparatus includes at least a memory circuitry, a processing circuitry, a data interpolation circuitry, and an image generating circuitry. The memory circuitry stores a plurality of pieces of reception data in an order of reception, the plurality of pieces of reception data being received continuously in a time series by a plurality of transducers, and is specified reading positions in an order different from the order of reception. The processing circuitry calculates a delay time, and calculates, based on the delay time, reading positions for acquiring reception data being used for calculating interpolation data from the memory circuitry. The data interpolation circuitry calculates interpolating data based on the plurality of pieces of reception data acquired from the calculated reading positions of the memory circuitry. The image generating circuitry generates an ultrasonic image based on a reception beam formed by using the interpolation data.
