To enable a plurality of nurses to instantaneously confirm required information without switching a screen through user operation.

A nurse call master unit comprises a plurality of displays 1b, 1c and by displaying information set to the plurality of displays 1b, 1c, respectively, without switching a screen through user operation, a nurse can instantaneously confirm required information. Furthermore, by accepting desired operation only via information displayed on the first display 1b, the second display 1c can be dedicated to browse information and even while a nurse executes operation in front of the first display 1b, a plurality of nurses can always confirm required information at the same time on the second display 1c.