An armature comprising, as a three-phase winding, a first-phase winding, a second-phase winding, and a third-phase winding star-connected to a neutral point, wherein said first-phase winding includes first to fourth first-phase winding portions (Lu1, Lu2, Lu3, Lu4) connected in series between said neutral point and a first-phase input end (Pu), said second-phase winding includes first to fourth second-phase winding portions (Lv1, Lv2, Lv3, Lv4) connected in series between said neutral point and a second-phase input end (Pv), said third-phase winding includes first to fourth third-phase winding portions (Lw1, Lw2, Lw3, Lw4) connected in series between said neutral point and a third-phase input end (Pw), said first to fourth first-phase winding portions, said first to fourth second-phase winding portions, and said first to fourth third-phase winding portions are arranged annularly around a predetermined location, each of said first to fourth first-phase winding portions, said first to fourth second-phase winding portions, and said first to fourth third-phase winding portions has a first winding end (s) and a second winding end (e) as ends thereof, and directions in which said first to fourth first-phase winding portions, said first to fourth second-phase winding portions, and said first to fourth third-phase winding portions are each wound from said first winding end to said second winding end are the same as viewed from said predetermined location characterized in that said first winding end (s) of said first first-phase winding portion and said first winding end (s) of said second first-phase winding portion are connected to each other, said second winding end (e) of said first first-phase winding portion and said first-phase input end (Pu) are connected to each other, said second winding end (e) of said second first-phase winding portion and said first winding end (s) of said third first-phase winding portion are connected to each other, said first winding end (s) of said fourth first-phase winding portion and said neutral point are connected to each other, said second winding end (e) of said fourth first-phase winding portion and said second winding end (e) of said third first-phase winding portion are connected to each other, said first winding end (s) of said third second-phase winding portion and said first winding end (s) of said fourth second-phase winding portion are connected to each other, said second winding end (e) of said fourth second-phase winding portion and said neutral point are connected to each other, said second winding end (e) of said third second-phase winding portion and said first winding end (s) of said second second-phase winding portion are connected to each other, said first winding end (s) of said first second-phase winding portion and said second-phase input end (Pv) are connected to each other, said second winding end (e) of said first second-phase winding portion and said second winding end (e) of said second second-phase winding portion are connected to each other, said first winding end (s) of said third third-phase winding portion and said first winding end (s) of said fourth third-phase winding portion are connected to each other, said second winding end (e) of said fourth third-phase winding portion and said neutral point are connected to each other, said second winding end (e) of said third third-phase winding portion and said first winding end (s) of said second third-phase winding portion are connected to each other, said first winding end (s) of said first third-phase winding portion and said third-phase input end (Pw) are connected to each other, and said second winding end (e) of said first third-phase winding portion and said second winding end (e) of said second third-phase winding portion are connected to each other.