To provide a spindle motor which increases the accuracy of fitting and inclination of bearing housings and bearings, and maintains the perpendicularity of each bearing with respect to a stator board with high precision and stably, without the interference from burrs produced around fitting holes on the bearing housings and bearings themselves, even if clearance grooves formed at square corners formed by collars and the fitting parts of the bearing housings or bearings themselves into the fitting holes are shallow.

In a spindle motor composed by boring fitting holes 25 in a stator board 2 made of metal having a wiring pattern made of a conductive member, and fitting and fixing bearings for supporting a shaft into the fitting holes 25, board thickness adjusting members 34 made of conductive members are laid in the peripheries of the fitting holes 25, and the end surfaces 24 of collars 22 formed in the peripheries of the bearings are brought into contact with the board thickness adjusting members 34.