Abstract: A frying apparatus for conveying food on a surface coated with oil heated for frying the food pieces has a tray which extends longitudinally for containing food pieces for frying, and an assembly is positioned for conveying food pieces in a direction from one end of the tray to the other so that during the conveying, the food pieces are mixed and so that the tray surface upon which the food pieces are fried is scraped for cleaning the surface. In two apparatus embodiments, members of the conveying assembly form a helical arrangement in an area about and are displaced a distance from a circumference of a rotatable shaft and are configured for scraping the tray surface for cleaning the surface, and in another embodiment, plate members which have a shape of a section of an ellipsoid plane are affixed with an axle at an angle with respect to a lateral cross-section of the axle so that upon rotation of the axle in one direction, the plate members convey food pieces.