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.