Linear motion guide unit

The linear motion guide unit has the lubricating means(15) that may be used incorporated in the conventional guide unit without substantial changes in principal specification. The lubricating means(15) is composed of a case(21) for containing therein lubricant and delivery means(30) for feeding the lubricant to the first raceway grooves(4) of the track rail(2). The delivery means(30) has heads(31) having outer surfaces(40) in sliding contact with the raceway grooves(4), and legs (32) integral with the heads(31) and extending into the case(21). The delivery means(30) is composed of, for example, porous sintered resin so that the lubricant contained in the case(21) permeates the heads(31) through the legs(32) extended in the case(21), and then oozes from the heads(31) to the raceway grooves(4) of the track rail(2).