ULTRASONOGRAPH

PROBLEM TO BE SOLVED: To provide an ultrasonograph suitably obtaining data of continuous wave Doppler mode by suppressing the lowering of the receiver power, even if there is a relative angular fluctuation between an ultrasonic probe setting the alignment direction of a transmission element and a receiver element to a rotary shaft, and the blood vessel. SOLUTION: In obtaining the data of the continuous wave Doppler mode, two or more angles of acoustic rays in the direction crossing at right angles with the alignment direction of the transmission element and the receiving element are simultaneously received in a first acoustic ray/second acoustic ray receiver portion 3, data of an acoustic ray with the largest receiver power is selected therefrom by a receiver power comparison part and a switch 7, and a display part 8 displays the continuous wave Doppler mode. Because the acoustic ray from such an angle as dispensing with receiver power reduction is adopted, the data of the continuous Doppler mode can be suitably obtained.