A support installation for a fairground attraction, comprises a base, two pairs of masts which can be moved between a collapsed and an erected position, as well as a head that in the erected position is at the top of the masts, on which head a Ferris wheel or a swing or the like can be mounted, wherein the masts each comprise several segments that are joined to one another such that they can pivot. Each mast has a base segment that is joined to the base such that it can pivot, as well as a top segment that is joined to the head, at least in the erected position. Relatively high masts can be obtained with this construction.