A disk drive apparatus able to prevent jamming of a disk and abutting parts having a rotary table fit on a shaft of a brushless motor and carrying a disk and a centering part elastically biased in an axial direction away from a center hole of this rotary table and fit in a center through hole of the disk to center and hold the disk, the centering part having inelastic abutting parts sticking out from a center taper part in radial directions and abutting against an inner circumferential edge of the center through hole and having outer circumferential groove parts forming clearances from the inner circumferential edge between the inelastic abutting parts adjoining each other in the circumferential direction.