A rotor comprising: a plurality of magnets (52, 52A, 52C) arranged in a circumferential direction around a center axis (9, 9A) which extends axially; and a laminated core (51, 51A, 51C) in which a plurality of thin plate cores (511, 511A, 511B, 511C) are laminated in an axial direction; wherein the laminated core (51, 51A, 51C) includes an inner core portion (61, 61A, 61B, 61C) which axially extends in a cylindrical shape in a region located farther radially inward than the magnets (52, 52A, 52C), and a plurality of outer core portions (62, 62A, 62C) which are arranged in the circumferential direction in a region located farther radially outward than the inner core portion (61, 61A, 61B, 61C); a magnetic gap (71, 72) which extends in the axial direction is provided at a position in the radial direction between adjacent outer core portions (62, 62A, 62C) and the inner core portion (61, 61A, 61B, 61C), and in the radial inside of the magnets (52, 52A, 52C); the plurality of outer core portions (62, 62A, 62C) and the plurality of magnets (52, 52A, 52C) are alternately arranged in the circumferential direction; the plurality of magnets (52, 52A, 52C) include a pair of circumferential end surfaces which are magnetic pole surfaces; the magnetic pole surfaces of the plurality of magnets (52, 52A, 52C) of the same pole face each other in the circumferential direction; and the plurality of outer core portions (62, 62A, 62C) include outer core caulking portions (92, 92A, 92C) which fix the plurality of thin plate cores (511, 511A, 511B, 511C) respectively, the inner core portion (61, 61A, 61B, 61C) includes a plurality of protruding portions (80, 80C) which protrude radially outward toward the magnetic gap (71, 72) characterized in that the inner core portion (61, 61A, 61B, 61C) includes inner core caulking portions (91, 91A, 91B, 91C) which fix the plurality of thin plate cores (511, 511A, 511B, 511C); and the inner core caulking portions (91, 91A, 91B, 91C) are positioned in the plurality of protruding portions (80, 80C) or radially inside of the plurality of protruding portions (80, 80C). a plurality of magnets (52, 52A, 52C) arranged in a circumferential direction around a center axis (9, 9A) which extends axially; and a laminated core (51, 51A, 51C) in which a plurality of thin plate cores (511, 511A, 511B, 511C) are laminated in an axial direction; wherein the laminated core (51, 51A, 51C) includes an inner core portion (61, 61A, 61B, 61C) which axially extends in a cylindrical shape in a region located farther radially inward than the magnets (52, 52A, 52C), and a plurality of outer core portions (62, 62A, 62C) which are arranged in the circumferential direction in a region located farther radially outward than the inner core portion (61, 61A, 61B, 61C); a magnetic gap (71, 72) which extends in the axial direction is provided at a position in the radial direction between adjacent outer core portions (62, 62A, 62C) and the inner core portion (61, 61A, 61B, 61C), and in the radial inside of the magnets (52, 52A, 52C); the plurality of outer core portions (62, 62A, 62C) and the plurality of magnets (52, 52A, 52C) are alternately arranged in the circumferential direction; the plurality of magnets (52, 52A, 52C) include a pair of circumferential end surfaces which are magnetic pole surfaces; the magnetic pole surfaces of the plurality of magnets (52, 52A, 52C) of the same pole face each other in the circumferential direction; and the plurality of outer core portions (62, 62A, 62C) include outer core caulking portions (92, 92A, 92C) which fix the plurality of thin plate cores (511, 511A, 511B, 511C) respectively, the inner core portion (61, 61A, 61B, 61C) includes a plurality of protruding portions (80, 80C) which protrude radially outward toward the magnetic gap (71, 72) characterized in that the inner core portion (61, 61A, 61B, 61C) includes inner core caulking portions (91, 91A, 91B, 91C) which fix the plurality of thin plate cores (511, 511A, 511B, 511C); and the inner core caulking portions (91, 91A, 91B, 91C) are positioned in the plurality of protruding portions (80, 80C) or radially inside of the plurality of protruding portions (80, 80C).