The invention provides a motor, and in particular, to an adhesive bonding structure between a base and a sleeve supporting a shaft. The motor shows greater bonding strength than ever in the case of impact. A holder portion (21) at the center of the base (2) is used for fixing the sleeve (3) by bonding. A shaft (4) supported in the sleeve (3) and capable of rotating is used for driving a rotor assembly (6) to a rotary spindle motor (1). An inner circumferential surface (22) of the holder portion (21) formed on the base (2) and an outer circumferential surface (32) bonded to the sleeve (3) of the inner circumferential surface (22) enable an adhesive groove (23) of the base (2) side coated with an adhesive P and an adhesive groove (23) of the sleeve (3) side to be at least oppositely arranged in part.