A spindle bearing for a two-for-one twisting spindle, with a spindle rotor having a thread guide body and a spindle shaft rotatably mounted in a vertical arrangement by a lower bearing device in a bearing housing which can be fastened to a spindle bank and which has an upper bearing device for mounting a protective pot. A lubricant duct extends from the top through the thread guide body at least approximately parallel to the rotational axis of the spindle shaft and opens into the lower bearing device.