Blood flow velocity was recorded by using Doppler transcutaneous flowmeter and Doppler catheter flowmeter in an 18-year-old woman with Takayasu's arteritis. Although no right radial artery pulse was felt by palpation, significant decrease and slow rise of the peak blood flow velocity, and inconspicuous dicrotic notch was observed and recorded from the right radial artery by using the transcutaneous Doppler flowmeter, and this was a significant change as compared with the contralateral blood vessel. Significant decrease of phasic peak aortic flow velocity was also observed in the stenotic area of the abdominal aorta by using Doppler catheter flowmeter. To our knowledge, this is the first case of Takayasu's arteritis which in measurements of blood flow velocity has been obtained in various circulatory beds.