An information display device includes a monitor, an operator, a display processor for displaying, on the monitor, identification information of item groups and items in the lower hierarchy of an item group, an item group selector for selecting one item group in response to an item group selecting operation on the operator, a display controller for making the display processor display, on the monitor, items in the lower hierarchy of the one item group selected by the item group selector, a first item selector for selecting an item from items currently displayed on the monitor in response to a first item selecting operation on the operator, and a second item selector for making the display processor sequentially display, on the monitor, items in the lower hierarchy of the item groups in response to a second item selecting operation on the operator, and for selecting an item from the displayed items.