A rolling element retainer for a linear guideway, wherein the rolling
groove of the connective part of the rolling elements retaining chain is
composed of a loaded area and a direction changing area. At either end of
the loaded-area retainer is arranged an outward extension for mating with
the direction-changing-area retainer. The outward extension extends in
the direction of the rolling groove of the loaded-area retainer and abuts
against a projection part of the end caps of the rolling element
retainer. Therefore, not only the motion stability of the linear guideway
is effectively improved, but also the rolling elements can move more
smoothly.