Abstract: A bearing installer for hub includes a threaded rod and a pushing device. The pushing device includes a pushing element. The threaded rod is inserted through a through hole of a sleeve tube or the pushing element, an axle, and an axle hole of the hub. A bearing is sleeved onto the sleeve tube or the axle. The pushing device is screwed to the threaded rod. When the pushing device is moved along the threaded rod, the bearing is pushed by the pushing device into a receiving room of the hub. Thereby, the bearing may not contact the threaded rod so that the bearing and the threaded rod are not abraded. Also, the hub is prevented from shaken so that the bearing is easier to be positioned.