PROBLEM TO BE SOLVED: To display a plurality of pieces of image data collected by using a plurality of ultrasonic probes in a high frame rate.SOLUTION: An ultrasonic diagnostic device 100 comprises: a plurality of ultrasonic probes 2 having a plurality of transmitting vibration elements and receiving vibration elements which perform ultrasonic transmission and reception to a subject a transmitting/receiving section 4 which supplies a driving signal for emitting transmission ultrasonic to the transmitting vibration elements and performs phasing addition of a reception signal obtained from the receiving vibration elements a scan control section 10 which performs the ultrasonic transmission and reception using the plurality of ultrasonic probes 2 to the subject at the same time an image data generation section 6 which generates a plurality of pieces of image data on the basis of the reception signal after the phase addition which is obtained in the unit of an ultrasonic probe and a display section 8 which displays the obtained plurality of pieces of image data.
