A spindle motor includes a housing, a rotor hub section arranged rotatably with respect to the housing, a sleeve section, a shaft fit rotatably in the sleeve section, a thrust plate mounted to the sleeve section and opposite to an end surface of the shaft. A thrust dynamic pressure bearing has a dynamic pressure bearing groove formed on the thrust plate, the thrust dynamic pressure bearing including lubricating oil at a relative slide interface between the thrust plate and the end surface of the shaft. The dynamic pressure bearing groove and a circumferential portion of the thrust plate are formed by etching, and a radial dynamic pressure bearing includes lubricating oil at a peripheral interface between the shaft and the sleeve section.