An electronic blood pressure monitor (1) has a switch (21) detecting whether a front cover is open or closed. When the front cover is opened by a subject, the switch (21) detects that the cover is opened, and outputs a detection signal to a control portion (16). In control portion (16) a CPU (161) operates in response to the detection signal being received to cause a power supply switch LED (51) to flash on and off/turn on. This indicates that of a variety of switches of a console (4), the type of manipulation switch that should first be operated is a power supply switch (41). |