Abstract: In a roller conveyor device, a plurality of rollers (7) are rotatably supported by left and right support walls (16)(16) which extend in the fore and back direction and scrapers (21) are provided on the fore and the back sides of each roller (7) respectively between both the support walls (16)(16). The scraper (21) comprises an upper wall (24a), a left and a right side walls (22b)(24b) and scraper portions (25) projected integrally in the fore and back direction from the upper wall (24a) and adapted to be kept in contact with an upper portion of an outer peripheral surface of each roller (7). Spherical shelly convexed portions (27)(27) are provided in each said side wall (24b), and through-holes (29)(29) for engaging with the respective spherical shelly convexed portions (27)(27) are opened in the inside surfaces of the respective support walls (16)(16).