Pulse wave measurement device, pulse wave measurement method, and blood pressure measurement device

A pulse wave measurement method including:

• using
• a belt to be mounted around a measurement site of a subject,
• at least one pulse wave sensor mounted on the belt, the at least one pulse wave sensor configured to detect a pulse wave of an artery passing through the measurement site,
• a pressing member mounted on the belt, the pressing member configured to vary a pressing force to press the at least one pulse wave sensor against the measurement site, and
• a body motion detection unit configured to detect presence or absence of body motion of the subject,
• to measure a pulse wave of the measurement site, the pulse wave measurement method comprising:
• setting a pressing force of the pressing member to a first pressing force when there is no body motion of the subject to measure a pulse wave with the at least one pulse wave sensor;
• and
• setting a pressing force of the pressing member to a second pressing force lower than the first pressing force and higher than zero when there is body motion of the subject and interrupting measurement of a pulse wave.