To provide an information displaying device capable of easily and surely conducting start-up inspection of a working vehicle.

After a preset starting time is displayed by a clock part 26, a key switch 22 is turned on for the first time. Prescribed start-up inspection items previously set and inputted are displayed on a displaying part 20, an operator conducts each of the start-up inspection items in turn based on the display, and when all start-up inspections are completed, the forklift truck is controlled to an actual workable state by a CPU 28.