A blood pressure measurement device includes a measurement air bladder for being wrapped around a body part to be measured, a compression member that compresses the measurement air bladder from the outside of the measurement air bladder against the body part to be measured an inflation member for inflating the measurement air bladder, a deflation member for deflating the measurement air bladder, a blood pressure determination unit that determines a blood pressure during the inflation by the inflation member or during the deflation by the deflation member, and a control unit that causes the compression member to apply a pressure that is higher than or equal to an atmospheric pressure to the measurement air bladder when an internal pressure of the measurement air bladder reaches or falls below a certain pressure due to the deflation by the deflation member.
