A rotor of a rotating electric machine, comprising: a field core (3,4) having claw-shaped magnetic poles and configured to rotate about a shaft integrally with the shaft; and a bobbin including a winding portion, fixed to the field core (3,4), for winding a field coil, flange portions provided at both sides, in an axial direction, of the winding portion, and a locking portion provided so as to extend radially outward from one of the flange portions and by which at least one end portion of the field coil is locked, wherein a plurality of cover portions insulating the field coil and the field core (3,4) from each other are formed on the flange portions in the circumferential direction so as to extend from outer peripheral portions of the flange portions, and the locking portion is disposed between the adjacent cover portions, wherein the locking portion includes a locking neck portion on which the field coil is wound, and a detachment prevention portion extending in a circumferential direction from the locking neck portion, wherein a length by which the detachment prevention portion extends from the locking neck portion to one side in the circumferential direction is longer than a length by which the detachment prevention portion extends from the locking neck portion to an other side in the circumferential direction, wherein at the one side, a second circling portion of the field coil is overlapped by a first circling portion of the field coil at a radially outer side of the first circling portion, the first circling portion is obtained by causing a terminal end of the field coil to circle around the locking neck portion of the locking portion and the second circling portion following the first circling portion, wherein at the other side, the second circling portion is not overlapped, so that the first circling portion and the second circling portion are inhibited from being detached from the locking neck portion, wherein a radial movement of the first circling portion and of the second circling portion is restricted by the detachment prevention portion, and wherein a projection is formed at the one side, in the circumferential direction, of the detachment prevention portion so as to project radially inward, so that the first and second circling portions (61,62) are restricted from moving away from the locking portion neck portion. a field core (3,4) having claw-shaped magnetic poles and configured to rotate about a shaft integrally with the shaft; and a bobbin including a winding portion, fixed to the field core (3,4), for winding a field coil, flange portions provided at both sides, in an axial direction, of the winding portion, and a locking portion provided so as to extend radially outward from one of the flange portions and by which at least one end portion of the field coil is locked, wherein a plurality of cover portions insulating the field coil and the field core (3,4) from each other are formed on the flange portions in the circumferential direction so as to extend from outer peripheral portions of the flange portions, and the locking portion is disposed between the adjacent cover portions, wherein the locking portion includes a locking neck portion on which the field coil is wound, and a detachment prevention portion extending in a circumferential direction from the locking neck portion, wherein a length by which the detachment prevention portion extends from the locking neck portion to one side in the circumferential direction is longer than a length by which the detachment prevention portion extends from the locking neck portion to an other side in the circumferential direction, wherein at the one side, a second circling portion of the field coil is overlapped by a first circling portion of the field coil at a radially outer side of the first circling portion, the first circling portion is obtained by causing a terminal end of the field coil to circle around the locking neck portion of the locking portion and the second circling portion following the first circling portion, wherein at the other side, the second circling portion is not overlapped, so that the first circling portion and the second circling portion are inhibited from being detached from the locking neck portion, wherein a radial movement of the first circling portion and of the second circling portion is restricted by the detachment prevention portion, and wherein a projection is formed at the one side, in the circumferential direction, of the detachment prevention portion so as to project radially inward, so that the first and second circling portions (61,62) are restricted from moving away from the locking portion neck portion.