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Summary form only given. Detection of blood vessel pulsation (BVP) waves are important for estimation of circulatory system functions and diagnosis for circulatory organs. We have developed a highly sensitive stress sensor having a 4000 gauge factor named SI sensor using a 20 /spl mu/m diameter CoSiB amorphous wire and CMOS IC multivibrator utilizing the stress-impedance effect and applied to detect the finger-tip BVP waves in which effects of smoking and drinking are clearly detected. In this paper, a simultaneous detection of BVP waves at the temple and the finger-tip of a healthy subject using a pair of SI sensors for investigation of their relation on sleeping and awaking in which the temple BVP precedes except during deep sleep.