The three-tiered securities file of the present invention has a height retainer selectively installed on one side of the front cover and the bottom cover or on both sides of the front cover and the bottom cover so that a constant height is always maintained so that the closed state of the side cover and the front cover is always accurately In addition to having the effect of making the height holder is inclined to protrude upward from the inner bottom, when closing the three-stage securities file, one side of the vinyl file is partially pressed by the height holder so that the Has the effect of preventing the disturbance.;3-stage, stock, file, height, holder
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