A stator for use in a superconducting rotating electrical machine, the rotating electrical machine comprising a rotor with superconducting windings and said stator mounted around the rotor, the stator comprising: a number of teeth disposed at a regular interval about a rotational axis of the rotor to define slots each between adjacent teeth; and a plurality of windings, each winding having a strip-like wire member, said wire member having a plurality of wires (44a-441) each having a rectangular cross-section in which said rectangular wires (44a-441) are arranged in parallel to each other and electrically insulated away from each other, said winding being constructed by winding said strip-like wire member a plurality of times with diametrically opposed portions of each turn twisted to have stacked first and second winding portions positioned on opposite sides of the diametrically-opposed twisted portions; wherein in a cross-section perpendicular to said rotational axis, the first and second winding portions each have a cross section in which said rectangular wires (44a-441) are positioned in matrix, and said first and second winding portions have a same arrangement of said rectangular wires (44a-44l), wherein said first winding portion of the winding is disposed in an outward region of one of said slots and said second winding portion of the winding is disposed in an inward region of another of said slots corresponding to said one of said slots such that the first winding portion of one winding and the second winding portion of another winding are received in each slot, wherein one of said windings and another of said windings disposed adjacent to said one winding are electrically connected to each other in a manner such that said rectangular wires (44a-44l) in said one winding positioned in order from an upstream side to a downstream side with respect to a rotational direction of said rotor are connected to said rectangular wires in said another winding positioned in order from said downstream side to said upstream side with respect to said rotational direction, respectively. a number of teeth disposed at a regular interval about a rotational axis of the rotor to define slots each between adjacent teeth; and a plurality of windings, each winding having a strip-like wire member, said wire member having a plurality of wires (44a-441) each having a rectangular cross-section in which said rectangular wires (44a-441) are arranged in parallel to each other and electrically insulated away from each other, said winding being constructed by winding said strip-like wire member a plurality of times with diametrically opposed portions of each turn twisted to have stacked first and second winding portions positioned on opposite sides of the diametrically-opposed twisted portions; wherein in a cross-section perpendicular to said rotational axis, the first and second winding portions each have a cross section in which said rectangular wires (44a-441) are positioned in matrix, and said first and second winding portions have a same arrangement of said rectangular wires (44a-44l), wherein said first winding portion of the winding is disposed in an outward region of one of said slots and said second winding portion of the winding is disposed in an inward region of another of said slots corresponding to said one of said slots such that the first winding portion of one winding and the second winding portion of another winding are received in each slot, wherein one of said windings and another of said windings disposed adjacent to said one winding are electrically connected to each other in a manner such that said rectangular wires (44a-44l) in said one winding positioned in order from an upstream side to a downstream side with respect to a rotational direction of said rotor are connected to said rectangular wires in said another winding positioned in order from said downstream side to said upstream side with respect to said rotational direction, respectively.