RED EMBODIMENTSA detailed description will be given below of one exemplary embodiment of a brushless motor and a disk drive according to the present invention while referring to the FIG. 4, FIG. 5, FIG. 6A, FIG. 6B, FIG. 7A, and FIG. 7B.FIG. 4 is a vertical cross sectional view of section O-X1 of FIG. 6A, illustrating a brushless motor including stator core according to the present invention.