To solve a problem that "New Barrier-free Law" specifies a low-floor bus as a standard one; however, an inter-urban shuttle bus is used for long-distance movement, and a bus for sightseeing specification must be used; the use of low-floor bus is difficult to apply and regarded as exception in a guideline; its improvement stays as a nonbinding target; a mainstream of bus elevating/lowering devices widely used for barrier-free bus employs a cargo lift remodeled for bus use; and a problem lies in the service environment such as the safety aspect and the occupied space for getting on/getting off outside the bus.

A bus elevating/lowering floor device is installed on a bus. A bus elevating/lowering floor surface is elevated/lowered only within the bus at an optional height from a road surface to a passage surface or a seat floor surface in the bus. The bus is provided with the bus elevating/lowering floor device which is developed to use an elevator in a general building and to be vertically operated in the bus safely and rapidly.

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