Disclosed is a new conceptive slider assembly applied to a zipper. The slider assembly comprises: a slider shaped in a cylinder of which bottom is opened, the slider of which both edges coupled with teeth are curved inward; a bottom stop fixed to an end of one side tape; and a locking unit fixed to an end of the other side tape, the locking unit being separably coupled with the slider disposed above the locking unit to limit movement of the slider, wherein the locking unit allows for or blocks the movement of the slider by coupling with or separation, in a vertical direction, from the bottom stop.