Be able to separate from the incident wave and the reflected wave easily from the pulsating wave data which is detected with the measurement region of 1 places, degree of arteriosclerosis the arteriosclerosis evaluation device which simply it can distinguish & can evaluate is offered. In 1 places of the living body the artery to detect the pulsating wave which is transmitted with pulsating wave detection means 1,51, that pulsating wave with resolution means 52 in the incident wave and the reflected wave resolution by fitting doing with failure unit function. Amplitude strength of the incident wave and the reflected wave resolution (the peak intensity) from degree of arteriosclerosis is evaluated.1箇所の測定部位で検出された脈波データから入射波と反射波とを簡単に分離でき、動脈硬化度を簡易に判別・評価できる動脈硬化評価装置を提供する。生体の1箇所において動脈を伝わる脈波を脈波検出手段1,51によって検出し、その脈波を分解手段52によってフィット関数でフィッティングすることにより入射波と反射波とに分解する。分解された入射波と反射波との振幅強度(ピーク強度)から動脈硬化度を評価する。
