The automatic analyzer is capable of performing other operations concurrently with a maintenance operation and notifying a user when a user action is required in executing maintenance and displaying guidance. Automatic analyzer includes analysis modules and that analyze a sample, a display device that displays information related to maintenance in the analyzer including the analysis modules and, and an overall management computer that controls a constant display area to be displayed on a display screen of the display device, in which when there is a need to notify a user of a maintenance status at a timing when the maintenance in the analyzer is executed in a background and a screen other than a maintenance screen is displayed on the display device, the overall management computer displays notification information on the screen including global areas and of the display device.