PROBLEM TO BE SOLVED: To provide an ultrasonic diagnostic device in which usability is improved when a user executes TGC (Time Gain Compensation).SOLUTION: An ultrasonic diagnostic device 100 comprises: a transmission part 2 which transmits an ultrasonic wave to a subject via an ultrasonic probe 101 a reception part 3 which generates a reception signal on the basis of a reflection ultrasonic wave a B-mode image generation part 4 which generates a B-mode image a display processing part 5 which generates image data a display part 102 which displays the image data and an operation part 103 which has a touch panel on a display region of the image data of the display part 102 and performs various setting of the ultrasonic diagnostic device when a touch operation by the user is performed on the display region. The display processing part 5 divides the ultrasonic image display region for displaying the B-mode image of the image data into a plurality of regions, and adjusts luminance of the B-mode image of the region to which a prescribed touch operation is performed on the basis of a prescribed rule for the prescribed touch operation when the prescribed touch operation is performed to the region by the user.
