A sphygmomanometer has an automatic inflation mode and a manual inflation mode as modes for inflating a cuff. During control in the automatic inflation mode, the sphygmomanometer can determine whether the mode should be switched to the manual inflation mode. Upon switching to the manual inflation mode, when inflation is being carried out in the manual inflation mode, a mark indicating that inflation is being carried out in the manual inflation mode is displayed in a display region in a display screen.
