Abstract: An adjustable stop device for use on vertical milling machines or the like having a table and a workpiece vise attached thereto, said stop device includes a base plate which may be mounted on the table of the milling machine adjacent the vise and a stop member which is supported by the base plate and is movable transversely, longitudinally and vertically with respect to the table to provide a positive adjustable stop for a workpiece clamped between the jaws of the vise thereby eliminating the time-consuming process of improvising a suitable stop for each lot of parts.