To prevent delay of an installing work term or maintenance and inspection work for an elevator.

The maintenance and inspection of a main wire rope 3 is made by two-stage-connecting supporting jigs 11A, made of a thin carbon steel pipe for machine structural use, to both the sides of an oil-containing shock absorber standingly provided at the center part of a pit 4. The upper and lower supporting jigs, wherein end plates are welded to the upper and lower ends of the steel pipes, are connected by bolts through the end plates. The supporting jigs can be composed of three pieces, also material can be composed of a shape steel or a glass-reinforced plastic pipe.