FIELD : medicine.SUBSTANCE : group of inventions relates to medicine, specifically to cardiovascular diagnosis. Vascular viscoelasticity evaluation device comprises : pulse component extraction means; differential waveform generation means; means for detecting the value of positive first amplitude peak (Vf1); means for detecting the value of negative second amplitude peak (Vr2); calculating means for calculating the ratio or difference of the value of positive amplitude peak (Vf1), and the value of the negative amplitude peak (Vr2), which is the second; and vascular viscoelasticity evaluation means for evaluating the viscoelasticity of blood vessels based on the ratio or difference of the peak amplitudes. Method is implemented using the claimed device.EFFECT : group of inventions allows to estimate with high accuracy the viscoelasticity of a blood vessel within one pulse wave, without affecting the rigidity of the blood vessel.8 cl 19 dwg