A coupling structure for bearing and bushing. The structure includes a ball bearing, a washer and an oil-retained bearing housed sequentially in a housing chamber of a bushing. The housing chamber has one end formed a lip opening for anchoring the bearings and the washer such that the bearings and the washer are allowed to attain precise positioning and concentricity, with reduced vibration, and prevent lubrication oil of the oil-retained bearing from flowing to the ball bearing to effectively minimize noise and vibration.