An escalator apparatus is comprised of a first specialized step, having a moveable tread which can rise and fall, and a second specialized step, which is adjacent to and above it and has a lift mechanism which can appear and disappear to support the moveable tread of the first specialized step. Both specialized steps are incorporated in a section of multiple steps which are arranged to run in an endless loop. When loading a wheeled conveyance, the lift mechanism projects and operates at a level section of an outward path, and runs on an inclined section while supporting the moveable tread at the same height as the second specialized step to guarantee an effective tread depth dimension for loading the wheeled conveyance. Furthermore, the construction provides guide means which tilts the moveable tread forward while it is being caused to rise to the same height as the second specialized step. Accordingly in the escalator apparatus, loading space for the wheeled conveyance can be easily guaranteed. In addition, there is no risk of the wheeled conveyance loaded on the escalator rolling down. As the escalator apparatus can transport the wheeled conveyance without pause, it can prevent a fall in the ability to transport wheeled conveyances and passengers.