In a drum for separating bulk goods, for example chopped crops, there are members (10A, 78) for feeding a mixed bulk goods substantially along the wall of the drum towards a barrier (66A, 80) disposed in the drum in front of which the greater part of the bulk goods can gradually be dammed up before it enters a separating portion in the drum. The barrier constitutes a starting point for the separation which is intended to be carried out in the separating portion with air as the main conveying means in the main conveying direction of the goods. One or more outlets (12A) are provided in the wall of the drum after said barrier.