To provide a wheel chair lifting device for railway vehicles which can have fail-safe functions by simplifying the structure.

In the wheel chair lifting device 2 for the railway vehicles which makes wheel chairs get on or off the vehicles, a boarding plate 11 on which the wheel chair is placed, an inclined jack mechanism 21 adapted to move the boarding plate 11 as kept horizontal parallel in a slant way perspective between a platform 10 and the inside of the vehicle involved, a plate sliding mechanism 41 adapted to pull the boarding plate 11 into the vehicle as kept horizontal with the inclined jack mechanism 21 and a jack sliding mechanism 61 adapted to pull the inclined jack mechanism 21 into a housing position from a working position near a gate of the vehicle are provided.