An ultrasonic diagnosis device characterized by the provision of the following: an ultrasound probe an ultrasound transmission unit that transmits ultrasound towards a subject through the ultrasound probe an ultrasound reception unit that generates a received signal on the basis of reflected waves corresponding to the aforementioned ultrasound a Doppler-signal generation unit that, on the basis of said received signal, generates a first Doppler signal and a second Doppler signal, said first Doppler signal resulting from biological motion in a prescribed direction inside a region of interest and said second Doppler signal resulting from motion that is slower than the motion inside the region of interest a velocity-display scale determination unit that determines a first velocity-display scale on the basis of a velocity distribution range from the first Doppler signal and determines a second velocity-display scale on the basis of a velocity distribution range from the second Doppler signal an image generation unit that generates a first Doppler image on the basis of the first Doppler signal and generates a second Doppler image on the basis of the second Doppler signal and a display unit that displays the first Doppler image at the first velocity-display scale and the second Doppler image at the second velocity-display scale.Linvention concerne un dispositif de diagnostic ultrasonique caractérisé par lapport de ce qui suit : une sonde à ultrasons une unité de transmission dultrasons qui transmet des ultrasons vers un sujet par la sonde à ultrasons une unité de réception dultrasons qui génère un signal reçu sur la base dondes réfléchies correspondant aux ultrasons susmentionnés une unité de génération de signal Doppler qui, sur la base dudit signal reçu, génère un premier signal Doppler et un deuxième signal Doppler, ledit premier signal Doppler résultant dun mouvement biologique dans une direction prescrite dans une région à laquelle on sintéresse et ledit deuxième
