The invention relates to a device for supporting a side washing brush (17; 19) of a vehicle-washing system (10) that can be rotated about a rotational axis (23; 25), wherein the device comprises a bearing apparatus (43) for rotatably supporting a drive shaft (47) and a retaining apparatus (56), which is rigidly connected to the bearing apparatus and which is retained on a frame (30) by means of elastic cushioning elements (64, 65) arranged above and below the retaining apparatus. In order to further develop the device in such a way that the risk of damage to the cushioning elements is reduced, only compressive forces oriented in the direction of the retaining apparatus (56) can be applied to the retaining apparatus (56) by the cushioning elements (64, 65). The invention further relates to a vehicle-washing system (10) having at least one such device, on which a side washing brush is retained.