A stator comprising: a stator core having a plurality of slots in a circumferential direction about an axis, the stator core having an end surface (15, 16) in a direction of the axis; and a first coil and a second coil each wound on the stator core in distributed winding, the first coil and the second coil being of different phases, wherein a winding factor is 1; wherein each of the first coil and the second coil has winding portions (21A-21F, 22A-22F), the number of which corresponds to the number of poles; wherein the winding portions (21A-21F, 22A-22F), the number of which corresponds to the number of poles, include a first winding portion (21A, 21C, 21E, 22A, 22C, 22E) and a second winding portion (21B, 21D, 21F, 22B, 22D, 22F) that are adjacent to each other in the circumferential direction; wherein the first winding portion (21A, 21C, 21E, 22A, 22C, 22E) and the second winding portion (21B, 21D, 21F, 22B, 22D, 22F) are inserted into one slot of the plurality of slots and extend from the one slot to both sides in the circumferential direction on the end surface (15, 16); wherein the first coil and the second coil are annularly disposed in different positions in a radial direction about the axis on the end surface (15, 16) of the stator core; and wherein the first winding portion (21A, 21C, 21E, 22A, 22C, 22E) is disposed on an outer side in the radial direction with respect to the second winding portion (21B, 21D, 21F, 22B, 22D, 22F) characterized in that an average circumference length of the second winding portion (21B, 21D, 21F, 22B, 22D, 22F) is longer than an average circumference length of the first winding portion (21A, 21C, 21E, 22A, 22C, 22E) so that the coil ends of the first and second winding portions can be aligned annularly by deforming the first and second winding portions outward in the radial direction; and in that a space factor of the first winding portion (21A, 21C, 21E, 22A, 22C, 22E) in the slot is smaller than a space factor of the second winding portion (21B, 21D, 21F, 22B, 22D, 22F) in the slot. a stator core having a plurality of slots in a circumferential direction about an axis, the stator core having an end surface (15, 16) in a direction of the axis; and a first coil and a second coil each wound on the stator core in distributed winding, the first coil and the second coil being of different phases, wherein a winding factor is 1; wherein each of the first coil and the second coil has winding portions (21A-21F, 22A-22F), the number of which corresponds to the number of poles; wherein the winding portions (21A-21F, 22A-22F), the number of which corresponds to the number of poles, include a first winding portion (21A, 21C, 21E, 22A, 22C, 22E) and a second winding portion (21B, 21D, 21F, 22B, 22D, 22F) that are adjacent to each other in the circumferential direction; wherein the first winding portion (21A, 21C, 21E, 22A, 22C, 22E) and the second winding portion (21B, 21D, 21F, 22B, 22D, 22F) are inserted into one slot of the plurality of slots and extend from the one slot to both sides in the circumferential direction on the end surface (15, 16); wherein the first coil and the second coil are annularly disposed in different positions in a radial direction about the axis on the end surface (15, 16) of the stator core; and wherein the first winding portion (21A, 21C, 21E, 22A, 22C, 22E) is disposed on an outer side in the radial direction with respect to the second winding portion (21B, 21D, 21F, 22B, 22D, 22F) characterized in that an average circumference length of the second winding portion (21B, 21D, 21F, 22B, 22D, 22F) is longer than an average circumference length of the first winding portion (21A, 21C, 21E, 22A, 22C, 22E) so that the coil ends of the first and second winding portions can be aligned annularly by deforming the first and second winding portions outward in the radial direction; and in that a space factor of the first winding portion (21A, 21C, 21E, 22A, 22C, 22E) in the slot is smaller than a space factor of the second winding portion (21B, 21D, 21F, 22B, 22D, 22F) in the slot.