Abstract: An arteriosclerosis evaluating apparatus 10 includes an arteriosclerosis evaluating procedure 46 (Steps S7, S8, S9, and S10) that evaluates arteriosclerosis of a living subject, based on a relationship between difference ?P of internal and external pressure of an artery of the subject in the state in which the pressure difference ?P is in equilibrium, and amplitude AM of a pulse wave produced from the artery. Therefore, the present apparatus 10 can as easily as possible evaluate the arteriosclerosis of the subject based on a characteristic curve 58 representing the relationship between in-equilibrium pressure difference ?P and pulse-wave amplitude AM which curve is obtained from a pressing pressure Pc of a cuff 12 wound around a certain portion of the subject, and the pulse wave produced from the artery.