To provide an easily portable automatic door stopper device capable of opening an automatic door of an elevator only for a necessary time without damaging.

This elevator has an outside door Q1 in an elevator entrance with respective floors, an inside door Q2 in a lifting car K and a bar P of a safety device for preventing users from being carelessly nipped by both doors Q1 and Q2. The automatic door stopper device 1 of the elevator is fixed in a state of pushing in the bar P of the safety device for opening both doors Q1 and Q2. The automatic door stopper device 1 has a pyramidal wedge body 2 of expanding backward by pointing the tip and a ring-shaped grip 3 arranged in a rear part of the wedge body 2. The wedge body 2 and the grip 3 are respectively formed of an elastic raw material such as an elastomer resin. A hard skeleton member 4 is respectively contained inside the wedge body 2 and the grip 3.

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