A kneading machine for food dough includes a rotatable kneading bowl, which includes in a bottom a central opening to discharge the food dough, and a closure at or in a vicinity of the opening in an operating position by a movable closure body, and to release the opening to discharge the food dough in a discharge position. The opening is at least partially surrounded by a scraper ring fastened to the kneading bowl and operable to cause an underside thereof to contact with the upper side of the closure body to wipe off a food dough located on the closure body when the closure body is moved from the operating position into the discharge position.