The invention concerns a tower for a wind turbine which tower supports a nacelle with bearings in which a horizontal rotation axis with blades can rotate, the tower comprises a steel wall of circular section, a drive for rotating the nacelle around a vertical axis of the circular section and at the bottom of the tower foundation means for supporting the tower in upright position. In accordance with the invention the foundation means comprises a bearing on a base which bearing supports the tower and a support ring positioned by three or more legs above the base for keeping the tower upright wherein in the support ring rollers or wheels press against the steel wall of circular section.