An automatic warehouse , comprising: a frame , defining a prismatic-shaped containment volume (V), with a vertical axis (X); an elevator , arranged inside the containment volume (V), comprising a platform , movable along a vertical direction; a locking device , interposed between the frame and the elevator , which is operable between a locking configuration, in which the elevator is constrained to the frame with respect to the vertical movements and is unable to move vertically, and a release configuration, in which the elevator is able to move vertically; wherein the locking device comprises at least one support member , connected to the frame so as to be able to support the weight associated with the platform ; in the locking configuration, the support member has a first portion , constrained to a first point of the platform , and a second portion , spaced apart from the first portion , constrained to the frame and/or to a second point of the platform , so that the platform is locked with respect to the sliding along the vertical axis (X) and the weight of the platform is supported by the frame by the support member ; in the release configuration, the support member isn't constrained to the platform or it isn't constrained to the frame , to allow a free movement of the platform along a vertical direction; characterized in that the support member is flexible. a frame , defining a prismatic-shaped containment volume (V), with a vertical axis (X); an elevator , arranged inside the containment volume (V), comprising a platform , movable along a vertical direction; a locking device , interposed between the frame and the elevator , which is operable between a locking configuration, in which the elevator is constrained to the frame with respect to the vertical movements and is unable to move vertically, and a release configuration, in which the elevator is able to move vertically; wherein the locking device comprises at least one support member , connected to the frame so as to be able to support the weight associated with the platform ; in the locking configuration, the support member has a first portion , constrained to a first point of the platform , and a second portion , spaced apart from the first portion , constrained to the frame and/or to a second point of the platform , so that the platform is locked with respect to the sliding along the vertical axis (X) and the weight of the platform is supported by the frame by the support member ; in the release configuration, the support member isn't constrained to the platform or it isn't constrained to the frame , to allow a free movement of the platform along a vertical direction; in the locking configuration, the support member has a first portion , constrained to a first point of the platform , and a second portion , spaced apart from the first portion , constrained to the frame and/or to a second point of the platform , so that the platform is locked with respect to the sliding along the vertical axis (X) and the weight of the platform is supported by the frame by the support member ; in the release configuration, the support member isn't constrained to the platform or it isn't constrained to the frame , to allow a free movement of the platform along a vertical direction; characterized in that the support member is flexible. <EOS>