A rotor or stator laminated iron core having a metal laminate, comprising a laminate, in which a first metal plate and a second metal plate are laminated, wherein: - the first metal plate includes a caulking that exhibits a shape protruding from a back surface side of the first metal plate and recessed on a front surface side of the first metal plate, and - the second metal plate includes an accommodating portion configured to accommodate the caulking of the first metal plate such that the caulking is fitted to the accommodating portion, wherein the caulking of the first metal plate includes: - a recessed portion provided on an inner concave surface of the caulking and recessed toward the back surface side of the first metal plate; and - an abutting portion provided on an outer convex surface of the caulking and abutted against an inner surface of the accommodating portion of the second metal plate at a position corresponding to the recessed portion, and wherein: - the abutting portion of the caulking of the first metal plate expands laterally from the outer convex surface toward the inner surface of the accommodating portion of the second metal plate, - the inner concave surface of the caulking includes a bottom surface (S3a) and an inclined side surface (S3b) extending upwardly from the bottom surface (S3a) towards the front surface, and - the recessed portion is positioned along a side edge of the bottom surface (S3a). comprising a laminate, in which a first metal plate and a second metal plate are laminated, wherein: - the first metal plate includes a caulking that exhibits a shape protruding from a back surface side of the first metal plate and recessed on a front surface side of the first metal plate, and - the second metal plate includes an accommodating portion configured to accommodate the caulking of the first metal plate such that the caulking is fitted to the accommodating portion, - the first metal plate includes a caulking that exhibits a shape protruding from a back surface side of the first metal plate and recessed on a front surface side of the first metal plate, and - the second metal plate includes an accommodating portion configured to accommodate the caulking of the first metal plate such that the caulking is fitted to the accommodating portion, wherein the caulking of the first metal plate includes: - a recessed portion provided on an inner concave surface of the caulking and recessed toward the back surface side of the first metal plate; and - an abutting portion provided on an outer convex surface of the caulking and abutted against an inner surface of the accommodating portion of the second metal plate at a position corresponding to the recessed portion, and - a recessed portion provided on an inner concave surface of the caulking and recessed toward the back surface side of the first metal plate; and - an abutting portion provided on an outer convex surface of the caulking and abutted against an inner surface of the accommodating portion of the second metal plate at a position corresponding to the recessed portion, and wherein: - the abutting portion of the caulking of the first metal plate expands laterally from the outer convex surface toward the inner surface of the accommodating portion of the second metal plate, - the inner concave surface of the caulking includes a bottom surface (S3a) and an inclined side surface (S3b) extending upwardly from the bottom surface (S3a) towards the front surface, and - the recessed portion is positioned along a side edge of the bottom surface (S3a). - the abutting portion of the caulking of the first metal plate expands laterally from the outer convex surface toward the inner surface of the accommodating portion of the second metal plate, - the inner concave surface of the caulking includes a bottom surface (S3a) and an inclined side surface (S3b) extending upwardly from the bottom surface (S3a) towards the front surface, and - the recessed portion is positioned along a side edge of the bottom surface (S3a).