In a base for an operating table comprising a support column (10) and a patient support surface, which base has a support frame (18) that is used to receive the support column (10) and rests on steering rollers, the at least approximately rectangular plate-shaped support frame (18) has at each of its corners one roller casing (28) rigidly connected thereto, the height of the roller casing is at least approximately equal to the height of the support frame (18) and one steering roller each is arranged therein such that it can be adjusted in height between an extended position in which it is supported on the floor and keeps the support frame (18) with the roller casings (28) at a distance to the floor and a retracted position in which the support frame (18) and/or the roller casings (28) rest on the floor.