A supporting device for a machine (2) standing on standing feet (4) at a distance from a floor surface of a floor. The supporting device has at least one supporting element (12), which has a holding part (44), which reaches, in an operating position, beneath the machine (2) and is detachably connected to a standing foot (4), and a supporting bracket (46) disposed thereon. The holding section (44) is configured as an essentially U-shaped bow having two arms (22, 24) which bear, in the fitted position, laterally against a standing foot (4). On the holding section (44) there are provided, perpendicular to the floor surface, stop faces (42), interacting with counter-faces of the standing foot (4), for fixing the holding section (44) to the standing foot (4). The arms (22, 24) are respectively provided, at their ends, with devices (25, 28) for coupling the said arms to the arms (24', 22') of a second supporting element (14).