A linear motion guide unit is disclosed which makes it possible to a
long-lasting steady application of lubricant and also makes sure of
preventing effectively occurrence of particles of dirt. The linear motion
guide unit is comprised of a guide member, more than one rolling element,
and a slider supported for linear movement along the guide track rail by
virtue of rolling elements, the slider being made therein with a
fore-and-aft hole in which a sleeve fits to allow the rolling elements to
roll through there. The sleeve is made of a cellular member impregnated
with lubricant in vacuum atmosphere.