To provide a locking method in case of an earthquake for a door or the like and an anti-earthquake shelf using the method, allowing a locking body to move independently of the return motion of the door or the like in case of an earthquake so that locking is not released by the return motion of the door or the like and in case of an earthquake, vibration is extended to the locking position to simplify a releasing mechanism.

According to this locking method in case of an earthquake, the locking body 2 is moved independently of the return motion of the door or the like, whereby locking is not released by the return motion of the door or the like so that in case of an earthquake, vibration is extended to the locking position to simplify the releasing mechanism.