An ultrasonic diagnostic device includes the following: a transmission/reception unit (2) that generates an echo signal from a reception signal transmitted from a probe that receives ultrasonic waves an image generation unit (3) that generates ultrasonic image data from the echo signal a display control unit (4) that outputs the ultrasonic image data or synthetic image data obtained by synthesizing various setting items and an ultrasonic image based on the ultrasonic image data and display unit (5) that displays the ultrasonic image data as an ultrasonic image or the synthetic image data as a synthetic image. The ultrasonic diagnostic device further includes a display switching control unit (6) that analyzes a predetermined switching factor, and outputs a display switching signal to the display control unit (4) when the display switching control unit (6) recognizes that a display switching condition for the switching of an image to be displayed on the display unit (5) between the ultrasonic image and the synthetic image is satisfied. The display control unit (4) switches the image to be displayed on the display unit (5) based on the display switching signal. With this configuration, the operator can switch the display states of the ultrasonic image and the various setting items by performing a normal diagnostic operation.
