Blood pressure measurement device

A blood pressure measurement device to be worn on a wrist of a user, the blood pressure measurement device comprising:

• a case including a case body, an attached portion provided at one of symmetrical positions in a circumferential direction of an outer peripheral surface of the case body, a shaft portion provided at the other symmetrical position, and a connected portion provided on a wrist side of the case body;
• a pump accommodated in the case body, the pump being fluidly continuous with the connected portion;
• a cuff including a connecting portion provided at a portion facing the wrist side of the case body, the connecting portion being connected to the connected portion, the cuff being fluidly connected to the pump through the connecting portion;
• and
• a belt including a bag body inside which the cuff is accommodated, the bag body having a band shape to be wound around the wrist, the bag body being formed with a hole disposed with the connecting portion on one end side in a longitudinal direction, an attachment portion including one end portion fixed on the one end side of the bag body and the other end side from the hole, and the other end portion attached to the attached portion, the attachment portion having a length from the one end portion to the attached portion shorter than a length from the one end portion to the connecting portion disposed in the hole, and a fixing portion provided at the bag body, the fixing portion being configured to fix a portion configured to be folded back and layered at the shaft portion of the bag body.