Abstract: A screw conveyor device for pourable material has a tubular or hose-like housing which near to one end is provided with an inlet opening and near to the other end with an outlet opening for the conveyed material, also a flexible core which extends through the housing and which is surrounded by at least one drivable feed coil consisting of wire or strip material, and a drive motor connected to one end of the housing. The core is rotatably mounted at both ends of the housing and driven by the drive motor in common with or relative to the feed coil or coils. It is possible for one or two feed coils to be provided.