An ultrasonic apparatus for medical diagnosis operating in accordance with the impulse-echo method, which includes a cylindrical parabola reflector and at least one ultrasonic transducer rotatably positioned in the focal line thereof for the transmission and receipt of ultrasonic signals, the latter of which being so constructed that the ultrasonic beam transmitted thereby after reflection at the reflector, is displaced during its rotation in a plane parallel in the sense of a line-by-line image build-up, and wherein the current receiving direction coincides with the transmission direction. The reflector, in conjunction with the ultrasonic transducer, is supported so as to be pivotable about a transverse axis, which is so oriented that by means of tilting or inclining of the reflector there may be scanned various object section planes.