A main body of a sphygmomanometer includes an air duct having an end connected to a tube extending from the cuff and another end connected to the inflation bulb. The main body also includes a pressure sensor that measures a pressure in the air duct, a display unit, a controller that controls display operation of the display unit in accordance with a measurement obtained using the pressure sensor, and a determination button. In the sphygmomanometer, the cuff, the tube, the air duct and the inflation bulb communicate with one another so as to have a uniform inner pressure, and the controller causes the pressure value measured when the determination button is pressed to be continuously displayed in the display unit.
