An ultrasonic diagnostic device according to an embodiment includes reception circuitry and processing circuitry. The reception circuitry outputs a plurality of reception signals corresponding to a plurality of reception scanning lines for each time of transmission/reception of ultrasonic waves performed by an ultrasonic probe. The processing circuitry performs filter processing on each of a plurality of first reception signals output from the reception circuitry based on a first ultrasonic wave transmitted from the ultrasonic probe using at least one specific second reception signal among a plurality of second reception signals output from the reception circuitry based on a second ultrasonic wave the sound field of which is adjacent to or partially overlapped with a sound field of the first ultrasonic wave. The processing circuitry generates image data based on the first reception signals subjected to the filter processing.
