In a coil mounting method, coils 8 are mounted on the teeth of a stator core to manufacture a stator for a rotating electric machine. Upon mounting the coils 8 onto the teeth, a plurality of winding portions 82A, 82B, 82C are held by being sandwiched in a radial direction R, and the most inner circumferential winding portion 82B of the winding portions 82A, 82B, 82C, which is disposed on the most inner circumferential side in the radial direction R, and the most outer circumferential winding portion 82A of the winding portions 82A, 82B, 82C, which is disposed on the most outer circumferential side in the radial direction R, are constrained in a circumferential direction. The most inner circumferential winding portion 82B and the most outer circumferential winding portion 82A are then relatively shifted in mutually opposite directions in the circumferential direction, thereby deforming the coils 8 and mounting the deformed coils 8 onto the teeth.