A biological information measurement device includes a heart rate counting unit for measuring an HR value indicating a heart rate on a basis of heart-rate data obtained by capturing heartbeats when a subject to be measured exercises, an analysis unit for performing power spectrum analysis on a heart rate variability frequency of the heart-rate data to calculate an LF value which is an integral value of low frequency components, and a detection unit for obtaining an HR/LF value by dividing the HR value by the LF value with respect to exercise intensity of the subject to be measured.