To prevent an erroneous report for requiring confirmation of location of a case to a medical worker, in the state where the light is put out in a sickroom in the nighttime, and the case of a nurse call slave machine is not covered with a futon.

A first illuminance sensor 4 is provided on a position where a case is difficult to be taken by a patient, and a second illuminance sensor 13 is provided on a wall unit 10 for relaying a call signal outputted from a nurse call slave machine 1. When a value detected by the first illuminance sensor 4 is below a first prescribed value, and a value detected by the second illuminance sensor 13 is over a second prescribed value which is larger than the first prescribed value, a notification for requiring confirmation of location of the case to a medical worker is performed by a notification part 23. Consequently, in the state where the inside of a sickroom is bright and the case is covered with a futon, a notification for urging confirmation of location of the case to the medical worker is performed, and in the other cases, the notification is not performed.