An ultrasonographic device includes: first region display means for displaying an echogram or an endoscope optical image on the entire display screen of a monitor; second region display means for displaying the reduced endoscope optical image in a part of the display screen of the monitor; third region display means for displaying a blood flow state image superimposed on the echogram displayed on the monitor; switching means for switching between the echogram and the endoscope optical image displayed on the monitor by the first region display means and, when the echogram is displayed by the first region display means, switching between display of the endoscope image by the second region display means and/or the blood flow state image by the third region display means; and image quality adjustment means for adjusting luminance and chroma in accordance with the image displayed on the monitor by the respective region display means.
