The invention relates to a machine frame (1) for a packaging machine being constructed in such a way that its manufacture is simple and flexible for the various widths and lengths of foil packaging material without having the need for an expensive and labor intensive intercoupling. This machine frame is also robust and interiorly good cleanable, so that hygienic risks may be substantially decreased. This machine-building element comprises a profile element (2) made of strong sheet material, like e.g. metal or plastic material, comprising a mainly straight horizontal part (2c) that tapers off on both sides over an angle of approximately 90° to two downwardly directed vertical parts (2a, 2b). These parts are longitudinally interconnected completely to a compact unit by means of a plurality of hollow functional sockets (7).