A blood-pressure measuring apparatus including a cuff having an inflatable bag, a first pulse-wave sensor which detects a first pulse wave propagated to the bag, a second pulse-wave sensor which detects a second pulse wave propagated to a downstream-side portion of the cuff wound around a body portion of a subject in a direction of flow of blood in an artery of the body portion, an amplitude correcting device for correcting a first group of respective amplitudes of heartbeat-synchronous pulses of the first pulse wave and/or a second group of respective amplitudes of heartbeat-synchronous pulses of the second pulse wave, so that one or more amplitudes of the first group that correspond to one or more pulses of the first pulse wave that are detected while the flow of blood is stopped by the inflated bag is equal to one or more amplitudes of the second group that correspond to one or more pulses of the second pulse wave that are detected while the flow of blood is stopped by the bag, an amplitude-difference determining device for determining, after the correction, a difference between each of the amplitudes of the first group and a corresponding one of the amplitudes of the second group, and a blood-pressure determining device for determining a blood pressure of the subject based on the respective differences between the respective amplitudes of the first group and the corresponding amplitudes of the second group.