To provide an electronic blood pressure monitor with increased measurement accuracy at the time of measurement of blood pressure at the wrist. A cuff has a pressure-increase structure for making a pressure to an ulna side of the wrist higher than a pressure to a radius side. The pressure-increase structure is achieved by providing an extrusion having a width narrower than a width of the cuff on the side facing the ulna portion. The extrusion is projected from the surface of the cuff. When the cuff is mounted on the wrist, the extrusion presses the ulnar portion with a pressure higher than an internal pressure of the cuff. <IMAGE>
