To securely fix a laminate core while suppressing applied stress as small as possible and preventing deterioration of magnetic characteristic, when fixing the laminate core into other member by being pressed.

An outer peripheral surface 13a of a rotor shaft 13 includes a plurality of shaft convex portions 17 formed intermittently in a lamination direction. The shaft convex portions 17 includes: a plurality of first convex portions 31 which are formed at a first pitch P1 in the lamination direction and extended in a circumferential direction; and a plurality of second convex portions 33 which are formed at a second pitch P2 in the lamination direction and extended in the circumferential direction. The first convex portions 31 and the second convex portions 33 are formed at least partially offset each other in the lamination direction and in the circumferential direction.