PROBLEM TO BE SOLVED: To lighten a bottom of a hoistway and a steel skeleton in the hoistway. SOLUTION: A car 12 and a balancing weight 13 are vertically movably mounted in the hoistway 11. A frame body 16 formed by a framed construction is mounted on the bottom of the hoistway 11, and a car bumper 18 or the like is mounted in the frame body 16. Upper parts of a car rail 14 and a balancing weight rail 15 are fixed to a cross beam 20, lower parts thereof are fixed to the flame body 16, and the load of the car 12 and the balancing weight 13 is supported by the frame body 16 through both rails 14, 15. A base isolation mechanism 25 is mounted between a building 10 and a foundation construction 24. Further a shielding wall 26 is mounted around the frame body 16 for preventing the outside air from flowing in the hoistway 11 through a clearance between the building 10 and the foundation construction 24. This shielding wall 26 is made of a soft heat-resisting member 26B.