To smooth running of a pallet at corner parts by making the roller used as the outer roller at the corner parts as a roller of a large diameter with a taper and allowing plural projections to be integrally formed to project at large intervals along its peripheral surface.

In a conveyer roller 2, rollers of equal diameters are fixed to its both ends of the straight line part, but in its corner part, a roller 4 of a large diameter having a taper is attached outside and a roller 6 of a small diameter having a taper is attached inside. Furthermore, on the peripheral surface of the outside roller 4, 2 to 4 pieces of projecting edges 5 of a length equivalent to the thickness of the roller 4 are integrally attached at a large interval as if the positions are mutually shifted. Then, in the corner part, this pallet P touches the roller 4 having large diametral outside and touches a roller 6 having small diametral inside and the corner is passed by those differences in peripheral speeds.