An apparatus for ultrasonic diagnosis including a probe configured to transmit ultrasonic waves and to receive reflected ultrasonic waves, an image generator configured to generate an ultrasonic image based on the reflected waves, an image synthesizing unit configured to generate a synthetic image in which a puncture guideline, which indicates a passing line of a puncture needle inserted from a puncture adapter attached to the probe, is superposed on the ultrasonic image, a display area adjusting unit configured to adjust a display area of the synthetic image based on the passing line of the puncture needle, and a display controller configured to display the synthetic image on a monitor based on the display area adjusted by the display area adjusting unit.