To stably support a game machine without damaging it.

This roller 14 of a roller conveyor apparatus 10 is pivotally supported between a pair of conveyor frames in a manner to be freely turnable, and is constituted of a roller body 18 with which the lower surface of the game machine comes into contact, and a pair of flange members 20 and 20 which are freely detachably fitted on the outer peripheral surface of the roller body 18. On a surface which faces the side edge section of the game machine 16 in the flange members 20, a tapered section 28 which separates from the side edge section of the game machine 16 as moving outward in the radial direction from the outer peripheral surface of the roller body 18 is formed. Then, the roller 14 is constituted in such a manner that the game machine 16 is prevented from falling while the damaging of the game machine 16 is suppressed by the flange members 20 and 20.