A physiological information processing method includes: acquiring electrocardiogram data of a subject； acquiring pulse wave data of the subject； measuring the heart rate based on the electrocardiogram data； measuring the pulse wave transit time based on the electrocardiogram data and the pulse wave data； calculating a cardiac output based on the pulse wave transit time and heart rate which have been measured； calculating the systemic vascular resistance； and correcting the calculated cardiac output based on the systemic vascular resistance.
