A roller conveyor I has a number of pairs of rollers present in a path, of each pair both rollers 3 are present on a common shaft 5. This shaft is fixed in the direction of transport in a U-shaped profile 7. For this purpose, the side portions 7b of the U-profile are provided with vertical slots and in the main portion 7a of the U-profile a further slot is present which connects the two side slots with one another. The shaft protrudes with both ends through the slots present in the side parts. The rollers are located on the ends of the shaft and are present adjacent to the U-profile. Under the shafts 5 a support plate 17 is present, including a lifting mechanism provided for lifting of the shafts. This lifting mechanism has an inflatable flexible hose 19 which can lift the supporting plate. Moreover, on the U-profile 7 a top plate 21 is present which is attached to the further profile 13.