To provide a prefabricated scaffolding that can ensure the safety of a worker on a scaffolding board by providing handrails side by side with braces.

In this prefabricated scaffolding A, a standard 4 is composed of a longitudinal pair of vertical members 1 and a horizontal member 2 extended between the vertical members, and the braces 5 crossed in X-shape and the horizontal scaffolding board 7 are laid between at least two standards 3 erected opposedly to each other in a lateral direction. A plurality of connecting members 10 are pivotally fixed in a rotatable manner between an upper rod 8 and a lower rod 9 parallel with each other, to provide the parallelogrammic foldable handrails 14, 14. The upper rod and lower rod are detachably connected to the standard through fixtures 12, 13 provided on both sides of the upper rod and lower rod to arrange the handrails side by side with the braces.