Abstract: An ultrasonic diagnosing apparatus for displaying an ultrasonic image of an organ of a patient including an ultrasonic probe for transmitting an ultrasonic wave toward a cavity wall of the patient and receiving an ultrasonic wave reflected by the cavity wall to produce an echo signal. A plurality of organ marks denoting a plurality of organs and a plurality of posture marks representing postures of the patient on a bed are previously stored in a memory. Any desired organ mark and posture mark are selectively read out of the memory and the thus selected organ mark and posture mark are displayed on a display screen of a monitor together with the ultrasonic image as a composite image. In superimposition on the organ mark there is further displayed an ultrasonic wave transmitting point indicating mark.