A method for manufacturing a field magnet configured such that a cylindrical bonded magnet is fixed in a tubular yoke (1; 5; 6) composed of a magnetic material, the bonded magnet obtained by binding magnet particles with a thermosetting resin, the method comprising: a softening step for reheating and softening the bonded magnet after thermal curing treatment; and a press-fitting step for fitting in the bonded magnet after the softening step from one end side of the yoke (1; 5; 6) to press an outer circumferential surface of the bonded magnet against an inner surface of the yoke (1; 5; 6), the press-fitting step including feeding the bonded magnet relatively into the yoke (1; 5; 6) by a feeding jig while allowing a relative posture variation between the bonded magnet and the yoke (1; 5; 6), and wherein the yoke (1; 5; 6) is supported by a receiving jig that is a bottomed cylindrical body comprising a cylindrical portion, an opening portion on one end side of the cylindrical portion, and a bottom portion on the other end side of the cylindrical portion and an inner diameter of the cylindrical portion is larger than an outer diameter of the yoke (1; 5; 6) such that there is a gap between the inner surface of the cylindrical portion of the receiving jig and the outer circumferential surface of the yoke (1; 5; 6), and wherein the feeding jig includes a base portion and a cylindrical interpolation portion extending from the base portion through a center of the bonded magnet, and the outer diameter of the interpolation portion of the feeding jig is smaller than the inner diameter of the bonded magnet such that there is a gap between the outer circumferential surface of the interpolation portion and the inner surface of the bonded magnet. a softening step for reheating and softening the bonded magnet after thermal curing treatment; and a press-fitting step for fitting in the bonded magnet after the softening step from one end side of the yoke (1; 5; 6) to press an outer circumferential surface of the bonded magnet against an inner surface of the yoke (1; 5; 6), the press-fitting step including feeding the bonded magnet relatively into the yoke (1; 5; 6) by a feeding jig while allowing a relative posture variation between the bonded magnet and the yoke (1; 5; 6), and wherein the yoke (1; 5; 6) is supported by a receiving jig that is a bottomed cylindrical body comprising a cylindrical portion, an opening portion on one end side of the cylindrical portion, and a bottom portion on the other end side of the cylindrical portion and an inner diameter of the cylindrical portion is larger than an outer diameter of the yoke (1; 5; 6) such that there is a gap between the inner surface of the cylindrical portion of the receiving jig and the outer circumferential surface of the yoke (1; 5; 6), and wherein the feeding jig includes a base portion and a cylindrical interpolation portion extending from the base portion through a center of the bonded magnet, and the outer diameter of the interpolation portion of the feeding jig is smaller than the inner diameter of the bonded magnet such that there is a gap between the outer circumferential surface of the interpolation portion and the inner surface of the bonded magnet.