And a bar, the device is an ultrasonic probe (1), which provides the ultrasonic diagnostic apparatus 200 to the arrival time or the blood concentration characteristic of the contrast material to properly distinguish between different lot of blood flow, a transceiver section (2) and, comparing the quadrature detector section 3, a power calculation section (4) and a final power (P) and the preceding peak value (P 0) for calculating a power (P) of the blood flow, and the peak the greater value ( P 'outputs a) and the peak value (P'), the elapsed time (t ') a power peak holding section 21 and the elapsed time (t0 corresponding to the preceding peak value (P 0) and it outputs a corresponding to) to maintain, these values the power peak holding section 21 preceding the power / elapsed time keeping section 22, a timer 11 for measuring the elapsed time (t) from a reference time and outputting a and the elapsed time ( t ') is that the color change before and after reaching the color change time (tc) that the brightness peak value (P' wave which changes according to) The war peak holding reset the blood flow image (G2) blood flow image generating section 25 and a timer 11 for generating and includes an operation section 12, a display 6, which specifies the color change time (tc) . For example, a blood flow through the blood flow and portal vein through the hepatic artery can be displayed in different colors.
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