A blood pressure measurement device measures blood pressure and a blood pressure change affecting factor of a patient. The device includes a memory, a tolerance determination section, and a display unit. The tolerance determination section includes a rest/unrest condition determination section and a blood pressure tolerance determination section. The tolerance determination section determines whether the blood pressure of the patient is tolerant to the blood pressure change affecting factor. The display unit of the device displays the measured blood pressure, the measured blood pressure change affecting factor, and a tolerance determination of the patient.