shows an end surface of a roller type guideway in accordance with the present invention wherein the roller type guideway is not equipped with end cap the roller type guideway comprises a rail 10 which is an elongated structure having four sliding surfaces 11 and 12 a slide block 20 having four reflow passages 21 22 and four sliding surfaces 23 24 a pair of half recirculating models 30 two ender caps 40 a roller model 50 which is made up of a plurality of rollers a dust proof plate 60 and two end seals 70 the slide block 20 is mounted on the rail 10 and slides thereon the sliding surfaces 11 12 abut against the sliding surfaces 23 24 of the slide block and the roller model 50 is disposed in the space defined by slide surfaces 11 12 of the rail 10 and the slide surfaces 23 24 of the slide block 20 the half recirculating models 30 are inserted in the reflow passages 21 22 of the slide block 20 the end caps 40 are assembled at both ends of the slide block 20 the dust proof pieces 60 are installed in the clearances at the lower part of the slide block for preventing dust the end seals 70 are disposed at the outer side of the ender caps 40 for stopping the dirty oil or dust on the rail 10 from entering into the slide block 20 fig3 is an exploded view for showing the half recirculating model.