A blood pressure data processing apparatus including a body movement index calculation unit, body movement intensity determination unit, and blood pressure data processing unit. The calculation unit calculates a body movement index of a user, which is a statistical value, in a unit period, of motion data obtained from a wearable motion sensor or pressure sensor data obtained from a pressure sensor array in a wearable blood pressure sensor. The determination unit determines which of a plurality of levels a user body movement intensity in the unit period corresponds to based on the body movement index. The blood pressure data processing unit performs first data processing on user blood pressure data obtained in the unit period if the body movement intensity is determined to be a first level, and performs second data processing if the body movement intensity is determined to be a second level.
