<p>A linear guide device, wherein a rolling element cage (24) holding balls interposed between a rail side rolling element rolling groove and a slider side rolling element rolling groove comprises two plate parts (244) formed of a synthetic resin material and facing each other on both sides of the slider body of a slider. The rolling element cage (24) comprises a positioning part in contact with the inner surface of the slider body and is positioned on the slider body by the positioning part.</p>
